🧪 Two positive controls — cloth and metal can ion count slides (Defense 1271-A)
◀ Home ◀ Evidence ◀ Edta Testing
Address:
C:\DEPT103\EVIDENCE\EDTA_TESTING\EDTA_TESTING--TWO-POSITIVE-CONTROLS-CLOTH-AND-METAL-CAN-ION-COUNT-SLIDES-DEFEN
🧪 Forensic in Edta Testing

Two positive controls — cloth and metal can ion count slides (Defense 1271-A)

Slide showing ion-count charts for two positive controls run on different days: a cloth swatch at approximately 8 million and a metal can at approximately 3 million. It was introduced to highlight the roughly three-fold difference between the controls.

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.

Defense 1271-A

Source proceedings (1)

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

Criminal trial (1)

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 …
Q206 sock stain LC-MS/MS chromatograms, runs 4088 and 4094 (Defense 1259-A, 1259-B)
Two LC-MS/MS chromatogram runs of Q206, the sock edge cutting: run 4088 (Defense 1259-A; Defendants' 1215) and run 4094 (Defense 1259-B; Defendants' 1216). The candidate rows describe the first as showing EDTA present and the second as a confirmatory positiv…
Rear-Gate EDTA Testing Graphs (People's 544 Series)
People's 544 graph series documenting Roger Martz's LC-MS/MS testing of rear-gate blood Q204 and a preserved-blood control. The series included graphs 544-A through D and chart 544-E; Martz, Robert Blasier, and Marcia Clark offered differing interpretations …
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…
Foreman and Trujillo 1954 EDTA absorption and pharmacokinetics study
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…
Roger Martz criminal trial testimony transcript
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…
about • glossary • search • privacy • terms •
1 procs · 2 people
The Simpson Matter
Department 103
🔬 Two positive controls — cloth and metal can ion count slides (Defense 1271-A)
EVIDENCE
Court Daemon Network
Dan Markel Archive Four trials in the Dan Markel murder case — Garcia–Magbanua, the Magbanua retrial, Charlie Adelson, and Donna Adelson. Alex Murdaugh The complete certified 2023 murder-trial transcript, searchable and synced to courtroom video. Elizabeth Holmes The native federal court-reporter record of the 2021 criminal fraud trial. Luigi Mangione The case as it stands: timeline, court dates, and documents. Commonwealth v. Read Both Karen Read murder trials, searchable and synced to video. Depp v. Heard The 2022 defamation trial, from court reporter transcripts.
Court Daemon Explore the full trial archive network. Trice Digital The studio behind the archives.