EDTA chromatograms of rear gate stain Q204 (Defense 1260-A/B; Defendants' 1218/1219/2292)
A set of FBI chromatograms testing bloodstain Q204 — the rear gate sample (LAPD Item 117) — for the presence of EDTA preservative. Run No. 4084 (Defense 1260-A / Defendants' 1218, dated 2/22) and Run No. 4049 (Defense 1260-B / Defendants' 1219, dated 2/28) were both read by Dr. Fredric Rieders as positive for EDTA; a third repeat test (Defendants' 2292) returned negative. The chromatograms were central to the defense planting argument and were extensively disputed between Rieders and FBI Agent Roger Martz regarding whether a full daughter spectrum was present.
Exhibit labels
How this item was marked across the four trials. The same physical item often gets different numbers in the criminal and civil trials.
Source proceedings (6)
Every proceeding where this item was discussed. Click through to the transcript.
Criminal trial (5)
- Day 120 Direct examination of Dr. Fredric Rieders (morning, part 2) witness: DR. RIEDERS
- Day 121 Direct examination of Roger Martz (part 2) witness: MR. MARTZ
- Day 135 Cross-examination of Dr. Fredric Rieders (part 3) witness: DR. RIEDERS
- Day 135 Cross-examination of Dr. Fredric Rieders (part 4) witness: DR. RIEDERS
- Day 135 Cross-examination of Dr. Fredric Rieders (part 6) witness: DR. RIEDERS