📄 Cross-examination of Collin Yamauchi (afternoon, part 2) — Tuesday, May 30, 1995
Address:
C:\DEPT103\CRIMINAL\1995\MAY\30\CROSS-EXAMINATION-OF-COLLIN-YA.DOC
TRIAL
▲ Day 84 of 167

Cross-examination of Collin Yamauchi (afternoon, part 2)

Witness: Collin Yamauchi
Examiner: Barry Scheck
Called by: Prosecution • Date: Tuesday, May 30, 1995 • Utterances: 324
Barry Scheck cross-examined LAPD DNA analyst Collin Yamauchi on two main fronts: contamination incidents at the LAPD lab (particularly anomalous results tied to Roche reagent kits) and the June 29th evidence review of the socks from Simpson's bedroom. The most significant moment was Yamauchi's admission that during that cursory June 29th review, he observed no blood on the socks — a key pillar in the defense's theory that blood was planted on them after the fact.
1 THE COURT:

All right. Let the record reflect that we've got all of our jurors back. All right. Mr. Scheck.

2 MR. SCHECK:

Mr. Yamauchi, do you have a problem with outbreaks of contamination at the LAPD laboratory?

3 MR. HARMON:

Objection. It's vague as to outbreaks.

4 THE COURT:

Sustained.

5 MR. SCHECK:

Have you ever heard the phrase "Outbreaks of contamination"?

6 THE COURT:

I take it we're referring to the serology PCR process?

7 MR. SCHECK:

We're referring to the DNA testing.

8 MR. YAMAUCHI:

I've heard it expressed in this case.

9 MR. SCHECK:

Before this case, had you ever heard the phrase?

10 MR. YAMAUCHI:

"Outbreak," no.

11 MR. SCHECK:

Had you read it in any document?

12 MR. YAMAUCHI:

Wouldn't have come to recollection before this case. No.

13 MR. SCHECK:

Have you read the national research council report on DNA typing?

14 MR. YAMAUCHI:

Yes, I have.

15 MR. SCHECK:

All right. Do you recall encountering the phrase in that report?

16 MR. HARMON:

Objection. Hearsay, no foundation.

17 THE COURT:

Overruled.

18 MR. YAMAUCHI:

Once again, because I saw it talked about in this case, I remember it from that. But prior to that, it wouldn't come to my recollection.

19 MR. SCHECK:

In the course of DNA typing at your laboratory from the moment you started through the time that you did testing in this case, have there been incidents where you as laboratory analysts discovered what you considered to be contamination problems?

20 MR. YAMAUCHI:

No.

21 MR. SCHECK:

Was there an incident involving lots or reagents concerning amplification run no. 33 that caused you to consult with the manufacturer about the kits that you'd been given?

22 MR. HARMON:

Objection. It's vague. "You" is vague, your Honor.

23 THE COURT:

Sustained. Rephrase the question.

24 MR. SCHECK:

All right. Was there an incident involving contamination which yourself, Erin Riley and others in your laboratory believed came from kits or reagents that you received from Roche?

25 MR. HARMON:

Objection. Calls for speculation, no foundation.

26 THE COURT:

Rephrase the question.

27 MR. SCHECK:

Do you have any recollection of contamination occurring in your laboratory which you believed was caused by kits you received from Roche?

28 MR. HARMON:

Objection. Calls for speculation, no foundation.

29 THE COURT:

Sustained. Rephrase the question.

30 MR. SCHECK:

Have you ever--withdrawn. Was there ever an incident of contamination in your laboratory which the people at the DNA unit believed came from the kits supplied by Roche?

31 MR. HARMON:

Objection. Calls for speculation, no foundation.

32 THE COURT:

Sustained. Why don't you cut the question in half.

33 MR. SCHECK:

All right. Was there ever an incident in your laboratory involving contamination from kits?

34 MR. HARMON:

Objection. Calls for speculation, hearsay, no foundation.

35 THE COURT:

Overruled.

36 MR. YAMAUCHI:

From kits specifically? We--we couldn't prove that or it couldn't be isolated down to actually being there, but it was put into a category where something to do with the reagents at that end were giving an anomalous result.

37 MR. SCHECK:

Well, could you explain for us what the problem was as far as you knew it to--

38 MR. HARMON:

Objection. No foundation. Calls for speculation.

39 THE COURT:

Overruled.

40 MR. YAMAUCHI:

Well, first of all, you're saying "Problem," and it's not necessarily a problem. What it is is, we have these controls like I was explaining before, and they're the indicators to us that something is a little bit different or out of the ordinary. And that indicator, by looking at our controls, we were able to figure out that something anomalous was taking place, and we isolated it to a specific area. As to whoever followed up on that and the responsibility of that, it was Mr. Matheson and Miss Riley.

41 MR. SCHECK:

And you had no part in that?

42 MR. YAMAUCHI:

Well, my initial input.

43 MR. SCHECK:

The anomalous results that you were talking about were contamination appearing in the negative controls on certain items?

44 MR. YAMAUCHI:

Well, the negative controls were showing activity, yes.

45 MR. SCHECK:

Positive controls?

46 MR. YAMAUCHI:

Positive controls were typing as they should.

47 MR. SCHECK:

And as a result of the contamination in the negative controls--you examined some of these strips yourself; did you not?

48 MR. YAMAUCHI:

Yes.

49 MR. SCHECK:

All right. And you tried to make a determination when you examined them as to whether or not there was contamination in the laboratory?

50 MR. YAMAUCHI:

That--well, yes. We would have to discover that, whether or not it's something to do with our handling process or some other area. There's ways of troubleshooting that.

51 MR. SCHECK:

Did you participate in that investigation as to the source of the contamination?

52 MR. YAMAUCHI:

Initially to a small extent, and then Erin Riley handled the rest.

53 MR. SCHECK:

Were you informed about all the other steps that were taken to investigate the contamination?

54 MR. YAMAUCHI:

Well, we discussed her train of thought and her rationale as to--

55 MR. SCHECK:

I'm sorry. Are you finished?

56 MR. YAMAUCHI:

Yeah. As to what her conclusions were and so on and so forth.

57 MR. SCHECK:

What were the conclusions that were reached as a result of this investigation of the contamination?

58 MR. HARMON:

Objection. Hearsay.

59 THE COURT:

Sustained.

60 MR. SCHECK:

Were you--did you subsequently operate on the premise that this contamination incident that you've just described was limited to just a series of bad lots in kits that you received from Roche?

61 MR. HARMON:

Objection. It's irrelevant, calls for speculation, hearsay.

62 THE COURT:

Overruled.

63 MR. YAMAUCHI:

There was some correlation, yes.

64 MR. SCHECK:

To your knowledge, did Roche--has anybody--did Roche indicate that any other laboratory had had problems with those kits?

65 MR. HARMON:

Objection. That's hearsay, your Honor.

66 THE COURT:

Sustained.

67 MR. SCHECK:

The--could you describe for us what the validation samples are that you test on an--withdrawn. Do you test validation samples on an ongoing basis in your laboratory?

68 MR. YAMAUCHI:

Validation samples, could you be more specific.

69 MR. SCHECK:

Do you on an on-going basis test known samples in your laboratory to see if you're getting correct results?

70 MR. YAMAUCHI:

Yes, with each run.

71 MR. SCHECK:

You're now referring to the positive controls?

72 MR. YAMAUCHI:

The positive amplification control as well as blood standards.

73 MR. SCHECK:

Beyond that, do you have a program in your laboratory where you take known blood samples, that is from people in the lab and others, and on an on-going basis, periodic basis, have analysts perform tests on those known standards?

74 MR. YAMAUCHI:

No. Nothing like that. But we do do the proficiency tests on a rather regular basis.

75 MR. SCHECK:

As far--have you reviewed hybridization strips and validation studies and casework from your laboratory from 1993 forward, you personally?

76 MR. YAMAUCHI:

From 1993 forward, I--I know my own stuff that I've worked on.

77 MR. SCHECK:

Have you reviewed other strips?

78 MR. YAMAUCHI:

Sometimes I confirm other hybridization sheets, yes.

79 MR. SCHECK:

All right. As far as you know, from all the sheets you've seen, do you have a contamination problem at the LAPD laboratory?

80 MR. YAMAUCHI:

Not a problem, but we see contaminants showing up, and that was an instance where such an anomaly showed up. And it's not outside of the ordinary from any other lab. That's why we have these controls set up within these systems to indicate to us that there's something there or possibly not there.

KEY QUOTE
81 MR. SCHECK:

Now, you just said that it wasn't any different from problems with other labs. How much familiarity do you have with work of other laboratories with respect to issues of contamination?

82 MR. YAMAUCHI:

Well, I've talked to Mark Taylor and the people at Roche. That's why they have these controls set up within there, to indicate if anomalies occur where there's something to look at and consider.

83 MR. SCHECK:

Your Honor, may we move now to the socks? And what I would request is that we put out some paper, the witness put on some gloves and that we put the socks out pretty much in the same area that we had them before when we conducted the direct examination.

84 THE COURT:

All right.

85 (Brief pause.)
86 THE COURT:

Do you have a board or something you want to use, Mr. Scheck? And, Mrs. Robertson, do we have some paper?

87 MR. SCHECK:

Yes. Actually--may I suggest that we follow the same procedure we did before by putting--

88 THE COURT:

All right.

89 MR. SCHECK:

--- I guess the white paper on top of the cart, having the witness come down and remove the socks. And I'll put up the sock board, Prosecution sock board.

90 THE COURT:

All right. What size are those?

91 MR. YAMAUCHI:

These are medium.

92 THE COURT:

Do we have any size large gloves? Mr. Scheck, we have one minor problem here. We don't have the right size gloves. All right. Let's proceed to something else.

93 MR. SCHECK:

I have nothing else. This is the end.

94 THE COURT:

This is it? My golly, let's find some gloves.

KEY QUOTE
95 MR. SCHECK:

I knew that would persuade--

96 THE COURT:

Deputy Magnera indicates they have some large ones available. He'll make a phone call.

97 MR. SCHECK:

I think I can proceed for just a moment then before we get that.

98 MR. SCHECK:

Now, on June 14th, did you see the socks, item no. 13, that were recovered from Mr. Simpson's bedroom?

99 MR. YAMAUCHI:

No.

100 MR. SCHECK:

To your knowledge, on June 14th or 15th or at any time prior to August 4th, was a photograph taken of the socks?

101 MR. YAMAUCHI:

Prior to August 4th, I really couldn't say. No.

102 MR. SCHECK:

When I say a photograph, I'm referring now to photographs other than those that were taken before it was collected. Are we--do we understand each other?

103 MR. YAMAUCHI:

I wouldn't know.

104 MR. SCHECK:

All right. Now, do you recall a visit by Dr. Michael Badin and Dr. Barbara Wolf to the LAPD lab in June of 1994?

105 MR. HARMON:

Objection. Beyond the scope.

106 THE COURT:

Sustained.

107 MR. SCHECK:

Your Honor, this goes to the socks.

108 THE COURT:

Briefly. Briefly.

109 MR. SCHECK:

Do you know of such a visit by Defense experts Badin and Wolf in June? Were you present for that?

110 MR. YAMAUCHI:

That sounds familiar. I don't know if it was in June or not.

111 MR. SCHECK:

All right. And when Dr. Badin and Dr. Wolf visited the LAPD lab, did you have occasion to view the socks in preparation for that visit?

112 MR. HARMON:

Objection. It's beyond the scope.

113 THE COURT:

Overruled.

114 MR. YAMAUCHI:

Do you have any specific dates?

115 MR. SCHECK:

Well, would June 22nd help?

116 MR. YAMAUCHI:

Did I see him on the 22nd?

117 MR. SCHECK:

Well, actually what I'm asking you is, do you recall seeing them in preparation for the visit or during the visit of Dr. Badin and Dr. Wolf?

118 MR. YAMAUCHI:

I'm not sure. I didn't take notes that day and I don't have independent recollection using your own terminology.

119 MR. SCHECK:

Well, so you do recall a visit by Dr. Badin and Wolf where you were present?

120 MR. YAMAUCHI:

Yes.

121 MR. SCHECK:

And items of evidence were displayed, but they were in bags?

122 MR. YAMAUCHI:

Some were, yeah.

123 MR. SCHECK:

And Dr. Badin and Dr. Wolf to the best of your knowledge were not allowed to handle and examine them? Is that your understanding and your recollection?

124 MR. YAMAUCHI:

I recall them asking to--to see certain items and then asking if they could look at them with magnifying glasses and stuff, and basically we were obliging them.

125 MR. SCHECK:

Do you recall seeing the socks during that visit?

126 MR. YAMAUCHI:

I can't recall specifically. I didn't take notes and my--Michele Kestler was taking notes.

127 MR. SCHECK:

Now, on June 29th, you--well, actually now that he's outfitted with the gloves, maybe we should--

128 THE COURT:

Proceed.

129 MR. SCHECK:

Could you please come down here, Mr. Yamauchi, and if you would open the envelopes, remove the socks and lay them out.

130 MR. YAMAUCHI:

Just got done opening the first plastic bag. The second plastic bag's already been cut. Removing a white envelope. Removing a brown paper bag from the white envelope. Removing a white envelope from the brown paper bag.

131 THE COURT:

Mr. Shapiro, Mr. Cochran, you're going to have to situate yourself to the left.

132 MR. COCHRAN:

Sorry, your Honor.

133 MR. YAMAUCHI:

Removing one sock, removing the other sock from the white paper envelope. Laying the socks out.

134 MR. SCHECK:

Now, Mr. Yamauchi, could I ask you to move the various pieces of packaging--

135 MR. SCHECK:

Your Honor, maybe--okay. Your Honor, could we just turn the paper around so the socks are closest to the jury?

136 THE COURT:

Yes.

137 (Mr. Scheck does so.)
138 MR. SCHECK:

And could I ask you to move back, if you could, the bags and the scissors.

139 (The witness complies.)
140 MR. SCHECK:

Yes. Now, on June 29th, you were part of an analysis of the evidence in this case that was being conducted by yourself, Mr. Matheson and Michelle Kestler.

141 MR. HARMON:

Objection. Beyond the scope. It's also argumentative.

142 THE COURT:

Sustained.

143 MR. SCHECK:

On June 29th, did you have occasion to review various items of evidence in this case?

144 MR. HARMON:

Objection. Beyond the scope.

145 THE COURT:

Overruled.

146 MR. YAMAUCHI:

Yes. We looked at various items together.

147 MR. SCHECK:

And that was you; is that correct?

148 MR. YAMAUCHI:

Yes.

149 MR. SCHECK:

It was Greg Matheson?

150 MR. YAMAUCHI:

Yes.

151 MR. SCHECK:

And it was Michele Kestler?

152 MR. YAMAUCHI:

Yes.

153 MR. SCHECK:

And Michele Kestler is the head of the laboratory?

154 MR. YAMAUCHI:

She is now.

155 MR. SCHECK:

And at that time, where did you conduct this examination of evidence?

156 MR. YAMAUCHI:

Where? In Michele Kestler's--I believe we were in her office.

157 MR. SCHECK:

And Mr. Matheson was the one who was keeping notes?

158 MR. YAMAUCHI:

Yes.

159 MR. SCHECK:

And you were the one who was actually taking the various items of evidence out and displaying them for the group?

160 MR. YAMAUCHI:

Yes. On a lot of items, I was displaying them.

161 MR. SCHECK:

And the purpose of this examination of each item of evidence was to make an assessment as to what kinds of serological or DNA tests should be performed on the various items of evidence?

162 MR. YAMAUCHI:

Yes. And at that time--let me explain once again.

163 MR. SCHECK:

Was that the purpose of the examination?

164 MR. HARMON:

Well, your Honor, again--

165 THE COURT:

Yes.

166 MR. SCHECK:

I move to strike. I asked him a specific question. I did not ask for an overall explanation. I move to strike.

167 THE COURT:

Reask your question. The answer is stricken.

168 MR. SCHECK:

All right. Did you go through the items of evidence collected up to that time one by one?

169 MR. YAMAUCHI:

I'm not aware of--well, yes, we looked at them one by one, but I'm not aware of what all evidence items were looked at. I was--I was along there to assist in the way that I'm trained.

170 MR. SCHECK:

Well, let me show you--are you familiar with a handwritten summary that was made of this review on June 29th?

171 MR. YAMAUCHI:

Yes. That looks like the one that Mr. Matheson was making out.

172 MR. SCHECK:

Can I mark this Defendant's next in order, your Honor, document that I think previously we referred to as exhibit K.

173 THE COURT:

1190.

174 MR. SCHECK:

1190?

175 (Deft's 1190 for id = evidence sheet)
176 MR. SCHECK:

Now, 1190 appears to you to be the sheet that Mr. Matheson was filling out with respect to the various items of evidence that the three of you were reviewing?

177 MR. YAMAUCHI:

It looks like it.

178 MR. SCHECK:

Okay. And in the course of this review on January 29th, you actually measured centimeters the Bundy swatches?

179 MR. YAMAUCHI:

Yes.

180 MR. SCHECK:

You took out a ruler and you didn't even touch the swatches. You just got near them and made your best measurements?

181 MR. YAMAUCHI:

Excuse me. In millimeters I believe. I'm not sure.

182 THE COURT:

All right. Mr. Yamauchi, you've going to have to keep your voice up for the court reporter.

183 MR. SCHECK:

And there came a--and were you reviewing these items on white pieces of lab paper in Miss Kestler's office?

184 MR. YAMAUCHI:

Yes. We had bench stoke, which is--it's like a paper with a kind of a waterproof seal on the back.

185 MR. SCHECK:

Would you be changing the paper as you went from item to item?

186 MR. YAMAUCHI:

Yes, unless we were looking at swatches which have their bindles underneath them, not allowing them to touch the table.

187 MR. SCHECK:

Now, there came a time when the three of you looked at the socks?

188 MR. HARMON:

Objection. That's argumentative. It calls for speculation.

189 THE COURT:

Sustained.

190 MR. SCHECK:

Did there come a time when the three of you looked at the socks?

191 MR. YAMAUCHI:

If it's--if it's in there, we took a look at it.

192 MR. SCHECK:

All right. I'm showing the witness page 2 of 1190. Does that refresh your recollection?

193 MR. YAMAUCHI:

Yes.

194 MR. SCHECK:

Now, would like you to turn over I guess the sock I'm pointing to now.

195 MR. SCHECK:

One second, your Honor.

196 (Discussion held off the record between Defense counsel.)
197 MR. SCHECK:

There's a sock that is now closest to the jury, and by the heel, there appears to be a no. 13 on it. Do you see that, sir?

198 MR. YAMAUCHI:

Yes.

199 MR. SCHECK:

All right. Now, let me just ask you to come to the board with me, which is 262-A, and I ask you to look at what's being depicted as sock A.

200 MR. YAMAUCHI:

Okay.

201 MR. SCHECK:

And the photograph to the right of sock A. See that?

202 MR. YAMAUCHI:

Okay.

203 MR. SCHECK:

And would you agree that in that photograph of sock A, there appears the same no. 13 that we see on the sock closest to the jury?

204 MR. YAMAUCHI:

That's the way it appears.

205 MR. SCHECK:

All right. Can we agree to call this sock with the no. 13 on the heel sock A? All right? For purposes of making this record.

206 THE COURT:

All right.

207 MR. YAMAUCHI:

Yes.

208 MR. SCHECK:

Now, would you turn sock a over?

209 (The witness complies.)
210 MR. SCHECK:

Do you see an arrow pointing upwards with the no. 13 on sock A?

211 MR. YAMAUCHI:

Yeah, that appears to be a 13. I'm not sure. It's not clearly legible.

212 MR. SCHECK:

And above that arrow, do you see a cut-out?

213 MR. YAMAUCHI:

Yes.

214 MR. SCHECK:

And what would you estimate the size of that cut-out to be?

215 MR. YAMAUCHI:

Rough approximation, approximately four by one centimeter.

216 MR. SCHECK:

Now, in the notes taken by Mr. Matheson, is there any observation--

217 MR. HARMON:

Objection. That calls for hearsay, your Honor.

218 THE COURT:

Sustained.

219 MR. SCHECK:

Do you know of any notation being made by yourself or anyone else on June 29th of seeing a reddish stain in the position of the cut-out on sock A?

220 MR. HARMON:

Objection. Calls for speculation. There's no foundation.

221 THE COURT:

Sustained.

222 MR. SCHECK:

Were notations being made of the observations of yourself, Mr. Matheson, Miss Kestler on June 29th as you examined items of evidence?

223 MR. HARMON:

Objection. Calls for speculation. No foundation.

224 THE COURT:

Sustained.

225 MR. SCHECK:

Were you making observations, comments on the items of evidence you were reviewing on June 29th?

226 MR. YAMAUCHI:

Was I--Greg was taking notes.

227 MR. SCHECK:

All right. You reviewed those notes?

228 MR. YAMAUCHI:

Yes.

229 MR. SCHECK:

Do those notes reflect--

230 MR. HARMON:

Your Honor, same objection. It's hearsay.

231 THE COURT:

Sustained.

232 MR. SCHECK:

Did you or anyone else in that room on June 29th observe a reddish stain in the position of the cut-out on sock A?

233 MR. HARMON:

Objection. Calls for speculation, hearsay, no foundation.

234 THE COURT:

Sustained. You can ask this witness as to what he himself saw.

235 (Discussion held off the record between Defense counsel.)
236 MR. SCHECK:

In terms of your observations, did you see a reddish stain in the area of the cut-out on sock A?

237 THE COURT:

Mr. Scheck, let's--that's not necessary.

238 MR. SCHECK:

Okay.

239 THE COURT:

Answer the question, Mr. Yamauchi.

240 MR. SCHECK:

Did you see a reddish stain in the area of the cut-out on sock A?

241 MR. YAMAUCHI:

No. I've never seen a reddish stain. The only observation I've ever made pertaining to a stain was some discoloration.

242 MR. SCHECK:

All right. Did you see a reddish discoloration in the area of the cut-out on June 29th on sock A?

243 MR. HARMON:

Objection. Asked and answered.

244 THE COURT:

Overruled.

245 MR. YAMAUCHI:

No.

246 MR. SCHECK:

Did you see in the area of the cut-out on sock a the material of the sock being crinkled and puckered?

247 MR. YAMAUCHI:

I can't remember that--well, that much detail. But what I do remember, with a cursory observation, look at, you couldn't notice any stains on that particular item. We didn't really look at it in detail at that time because we were just generating notes, and I guess they needed it for some type of a game plan as to how to handle this evidence.

248 MR. SCHECK:

So the answer to my question with respect to whether you saw the material in the area of the cut-out on sock a as being crinkled and puckered on June 29th, the answer is no?

249 MR. HARMON:

Objection. Asked and answered.

250 THE COURT:

Overruled.

251 MR. YAMAUCHI:

I don't recall specifically crinkled or puckered or anything like that.

252 MR. SCHECK:

On June 29th, you knew that these socks came from Mr. Simpson's bedroom?

253 MR. YAMAUCHI:

I may or I may not have at that point. I'm not sure.

254 MR. SCHECK:

Was there any discussion among you and Mr. Matheson and Miss Kestler as to whether the socks came from Mr. Simpson's bedroom?

255 MR. HARMON:

Objection. Calls for hearsay.

256 THE COURT:

Sustained.

257 MR. SCHECK:

Was it your state of mind on June 29th that these socks were a particularly important piece of evidence?

258 MR. YAMAUCHI:

I don't remember that clearly. But all the items of evidence that we were looking at, I didn't know the history behind each and every one of them. I don't know when I heard that that was from his house or where they collected it from or anything like that.

259 MR. SCHECK:

You just said I believe that you're sure that the examination of these socks was cursory. Were those your words?

260 MR. YAMAUCHI:

Yes.

261 MR. SCHECK:

Do you have an independent recollection that the examination of these socks, a white piece of paper, Michele Kestler's office with you and Mr. Matheson, Michele Kestler is cursory?

262 MR. YAMAUCHI:

That's right. We looked at everything quickly. We didn't take time to take a very detailed examination of the evidence items.

KEY QUOTE
263 MR. SCHECK:

You measured the swatches?

264 MR. YAMAUCHI:

There was a purpose behind that and they had their reasons for wanting to do that.

265 MR. SCHECK:

Your purpose in reviewing each of these items was to make a determination as to what kind of further serological or DNA testing should be performed?

266 MR. YAMAUCHI:

I think the key word's "Potential," what potential types of testing could be performed. It wasn't meant to hard and fast draw the line here and say, "We're sending this here and that there." But we needed some kind of idea or, you know, they did. They're the ones that make the decisions in that sort of area.

267 THE COURT:

Mr. Scheck, do you need him there at that location? Because the court reporter is having great difficulty with his back turned toward her.

268 MR. SCHECK:

Well, perhaps--maybe if we face--if he faces this way and I stand over here, that might be better.

269 THE COURT:

Don't forget the jurors.

270 MR. SCHECK:

Well, no, I'm not.

271 MR. SCHECK:

In order to determine the potential for testing, you have to make observations about the amount of blood on an item?

272 MR. HARMON:

Objection. That's argumentative.

273 THE COURT:

Sustained. Rephrase the question.

274 MR. SCHECK:

In the course of determining the potential for testing, is it not important to make observations about blood on the various items of evidence?

275 MR. YAMAUCHI:

Well, if it's not patently obvious, in other words, if you can't--it doesn't jump right out at you, then there's not much we can do about it. At that stage, we just wanted to take a look at it and say, "Wow, there's blood here, okay. Then looks like there's enough potentially to do RFLP." But if it's not obvious in such a quick look, then we couldn't make that determination.

276 MR. SCHECK:

Wasn't--

277 MR. YAMAUCHI:

And it would have to be looked at again more carefully at a later time.

278 MR. SCHECK:

Wasn't one of the boxes on this sheet you were preparing to determine--

279 MR. HARMON:

Objection. That misstates it. He didn't prepare that, your Honor.

280 THE COURT:

Sustained.

281 MR. SCHECK:

Wasn't one of the boxes on the sheet that Mr. Matheson was writing on--

282 MR. HARMON:

Objection. That's irrelevant. It's hearsay. It's Matheson's report.

283 THE COURT:

Sustained. The form is irrelevant at this point.

284 MR. SCHECK:

Well, wasn't one of the determinations that you were assisting in making is what kind of future testing could be performed on the various evidence items?

285 MR. YAMAUCHI:

Yes. I--excuse me. I stated that already. We were looking at these things to see whether they had potential for RFLP or PCR and serological testing, conventional serological testing. So we had to take a quick run through and look at them and assess them. They--that was by no means--at least indicated to me by Michele and Greg going to be a final analysis by any stretch.

286 MR. SCHECK:

Well, you were trying to determine whether you could perform conventional serology, RFLP, PCR or all of them on a particular item, right?

287 MR. HARMON:

Objection. Asked and answered.

288 THE COURT:

Overruled.

289 MR. SCHECK:

Isn't that right?

290 MR. YAMAUCHI:

Yes.

291 MR. SCHECK:

And you were also trying to determine whether you could perform all of those tests and still have some left over to give to the Defense?

292 MR. YAMAUCHI:

Yes.

293 MR. SCHECK:

And wasn't that the purpose of looking at these items?

294 MR. YAMAUCHI:

To get a general idea, an approximate idea of what you just stated, yes.

295 MR. SCHECK:

And in order to determine if you could do an RFLP test, a PCR test and a conventional serology test on sock A, don't you have to examine it to determine how much blood is on it if any?

296 MR. HARMON:

Objection. That's argumentative, "Blood."

297 THE COURT:

Overruled.

298 MR. YAMAUCHI:

Once again, I was under the understanding that we were there to do what we could by just looking at the items. Further testing to be sure whether or not there's blood on it would have to be done and tested with something like that phenolphthalein test that I explained earlier. That was not a part or an intention of that particular meeting. At least, that's not what was conveyed to me.

299 MR. SCHECK:

In other words, you were taking out these evidence items and looking at them to determine whether you could perform conventional serology, RFLP and PCR, but you weren't taking any particular care to look at the item to see if there was blood on it. Is that what you're saying?

300 MR. HARMON:

Objection. Argumentative.

301 THE COURT:

Sustained as phrased.

302 MR. SCHECK:

Mr. Yamauchi, after you, Michele Kestler and Mr. Matheson put that sock out--put those socks out on white paper, looked at them, did you not conclude that you had done a blood search and none--no blood was observed?

303 MR. HARMON:

Objection. That's compound.

304 THE COURT:

Sustained.

305 MR. SCHECK:

Did you not conclude after your examination of the socks there was no blood on them?

306 MR. YAMAUCHI:

No. Not definitively. If you add in visual observation, that probably would be okay. But we didn't do any chemical test to show that for sure there's no indication of blood there.

KEY QUOTE
307 MR. SCHECK:

So from your visual observation and examination of the socks, you saw no blood on either of them?

308 MR. YAMAUCHI:

I didn't see anything that appeared to be blood at that time.

KEY QUOTE
309 MR. SCHECK:

And after you I guess--did there come a point in time when you wrapped up the socks and you put them back I guess at that point in the brown paper bag?

310 MR. YAMAUCHI:

Yeah. At a certain point, we would have concluded and have to put everything away.

311 MR. SCHECK:

And you put both socks in that same brown paper bag?

312 MR. YAMAUCHI:

I would have put it back as I had found it when I took it out. I can't remember exactly which way that was.

313 MR. SCHECK:

When you found it on June 29th, were both socks just in that--excuse me--brown paper bag?

314 MR. YAMAUCHI:

I believe so.

315 MR. SCHECK:

Sorry?

316 MR. YAMAUCHI:

I believe so.

317 MR. SCHECK:

And they were subsequently put in the envelope?

318 MR. YAMAUCHI:

Yes. I believe that was done at a different time.

319 MR. SCHECK:

And to your knowledge, have any of the cuts in either of those socks been made by Defense experts?

320 MR. HARMON:

Objection. Calls for speculation.

321 THE COURT:

Sustained.

322 MR. SCHECK:

Do--when you put the socks found back in the--in its packaging on June 29th, did you see any reddish powder of any kind on the white piece of paper?

323 MR. YAMAUCHI:

I don't recall anything like that.

324 MR. SCHECK:

No further questions.

Temperature

tense

Key Quotes (5)

Collin Yamauchi
I didn't see anything that appeared to be blood at that time.
Yamauchi's admission that the socks showed no visible blood during the June 29th review is central to the defense's planted-evidence theory — blood was later found and typed as Nicole Brown's.
Collin Yamauchi
That's right. We looked at everything quickly. We didn't take time to take a very detailed examination of the evidence items.
Confirms the June 29th review was cursory, undermining any prosecution argument that the absence of notation about blood stains means nothing.
Collin Yamauchi
Not a problem, but we see contaminants showing up, and that was an instance where such an anomaly showed up. And it's not outside of the ordinary from any other lab.
Yamauchi tries to minimize the contamination issue but effectively concedes that contamination events did occur at the LAPD lab.
Collin Yamauchi
No. Not definitively. If you add in visual observation, that probably would be okay. But we didn't do any chemical test to show that for sure there's no indication of blood there.
Scheck gets Yamauchi to acknowledge that his June 29th observation was only visual, not chemical — leaving open the question of how blood appeared on the socks afterward.
Lance A. Ito
This is it? My golly, let's find some gloves.
Brief levity — the examination nearly ended early because the court had no large gloves for Yamauchi to handle the socks.

Evidence (5)

Item 13
Two socks recovered from OJ Simpson's bedroom
Physically laid out by Yamauchi for jury; examined for cut-out, staining, and packaging history
Defendant's 1190
Handwritten evidence review summary prepared by Greg Matheson during the June 29, 1994 review session
Marked for identification; used to refresh Yamauchi's recollection about the scope of the review
People's 262-A
Prosecution sock board with photographs of sock A and sock B
Used to identify which sock was 'sock A' by matching item number 13 on the heel
Informal
Roche DNA typing kits / reagents — amplification run no. 33
Discussed as possible source of contamination anomalies (negative controls showing activity)
Informal
National Research Council report on DNA typing
Referenced to establish that Yamauchi had read literature discussing 'outbreaks of contamination'

Notable Exchanges (3)

Barry ScheckCollin Yamauchi
Scheck methodically established that on June 29th, Yamauchi, Matheson, and Kestler conducted only a cursory visual examination of the socks and saw no blood — laying groundwork for the defense theory that blood was added to the socks after this date.
strategic
Barry ScheckCollin Yamauchi
Scheck pressed Yamauchi on a cut-out on sock A measuring approximately 4x1 cm, trying to establish that no reddish stain or crinkled material in that area was noted on June 29th. Yamauchi denied seeing any reddish stain, ever — but only recalled 'discoloration.'
revealing
Barry ScheckCollin YamauchiRockne Harmon
Extended battle over LAPD lab contamination, with Harmon repeatedly objecting on hearsay and speculation grounds (sustained) as Scheck tried to get Yamauchi to characterize the anomalous PCR results as a contamination 'problem.' Yamauchi consistently softened language.
procedural

Light Moments (2)

Lance A. Ito
Scheck announced he had 'nothing else' before realizing he still needed gloves to have Yamauchi handle the socks. The court didn't have large gloves available. Judge Ito said 'My golly, let's find some gloves' and a deputy called to find some.
Collin Yamauchi
Yamauchi narrated his own actions in real time as he unpacked the socks: 'Just got done opening the first plastic bag. The second plastic bag's already been cut. Removing a white envelope. Removing a brown paper bag from the white envelope...'

Credibility Attacks (3)

⚔ Collin Yamauchi
Prior inconsistent observation / planted evidence foundation
Scheck established that Yamauchi saw no blood on the socks during a June 29th review, contrasting with blood later found and typed — implying the blood was planted after that date.
⚔ LAPD DNA Laboratory
Institutional credibility / contamination history
Scheck documented a prior contamination incident (anomalous negative controls linked to Roche kits) at the LAPD lab, with Yamauchi conceding it occurred even while minimizing it as routine.
⚔ Collin Yamauchi
Memory and documentation failures
Scheck repeatedly exposed that Yamauchi took no notes during the June 29th review and lacked independent recollection of key details (the stain, the crinkled material, which socks he saw).

Witness Demeanor

(The witness complies.) — when asked to arrange socks and move packaging
Repeatedly hedged and softened answers under pressure ('Not a problem, but...', 'not necessarily a problem')
Frequently said he had no independent recollection of specifics, attributing this to lack of note-taking

Objections

38 objections (22 sustained, 10 overruled)
Proceeding 6207 • 324 utterances • Prosecution witness
Criminal Trial
Department 103
⚖️ Start
📂 MAY 30, 1995 📄 Cross-examination of Collin Ya
MAY 30, 1995 KRT DvH TD