🧪 Summary chart — July 22, 1995 EDTA analysis all samples (People's 552)
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Summary chart — July 22, 1995 EDTA analysis all samples (People's 552)

Red bar chart prepared by Martz summarizing the July 22 EDTA analysis of a blank, known standards, 1993 stains, and Martz's blood with and without EDTA. During questioning, Martz agreed that ion counts varied approximately four-fold that day and described the variance as unusually large.

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People's 552

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Every proceeding where this item was discussed. Click through to the transcript.

Criminal trial (2)

More in Edta Testing

Harmon Letter to Roger Martz Concerning EDTA Testing — Defense 1263 / Defendants' 1223
A two-page letter dated February 16, 1995, from prosecutor Rockne Harmon to FBI Agent Roger Martz concerning EDTA testing of sock and back-gate samples and asking Martz to “refute the possibility” of planted blood. Identified as Defense 1263 in the criminal …
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K67/K68 — EDTA-Preserved Reference Blood Controls
K67 and K68, known EDTA-preserved reference blood samples from O.J. Simpson and Nicole Brown Simpson used as positive controls in Roger Martz's EDTA testing. Testimony described them as producing strong EDTA signals, including a large 160-ion abundance.
Fredric Rieders' EDTA Report on Gate and Sock Stains (People's 586)
Dr. Fredric Rieders' two-page report dated July 17, 1995, evaluating Agent Roger Martz's EDTA test results for the gate and sock stains. Introduced as People's 586, the report and its disclosure timing were disputed, and prosecutors used its documentation of…
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A 1954 Foreman and Trujillo study using radioactively labeled EDTA administered to human subjects to examine oral absorption and pharmacokinetics. Rieders and Martz cited it in their dispute over baseline EDTA levels and dietary absorption; its last page was…
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Excerpts from Roger Martz's criminal-trial testimony at page 38641, page 38649, and pages 38711–38712. They were referenced in later proceedings for foundation and impeachment concerning whether Martz's methods were quantitative and regarding his Quantico va…
50 ppm EDTA standard chromatograms, February 22 — morning and afternoon runs (Defense 1262-A, 1262-B)
Chromatograms of a 50-parts-per-million EDTA standard run on February 22 at 9:32 AM (discovery page 4077; ion count 319,561; Defense 1262-A) and 1:48 PM (discovery page 4070; ion count 49,393; Defense 1262-B). They were compared during testimony to demonstra…
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🔬 Summary chart — July 22, 1995 EDTA analysis all samples (People's 552)
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