🔍 Martz LC-MS/MS testing graphs of rear gate stain Q204 (People's 544 series)
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🔍 Physical in Bundy Rear Gate Blood

Martz LC-MS/MS testing graphs of rear gate stain Q204 (People's 544 series)

Four LC-MS/MS (liquid chromatography–tandem mass spectrometry) graphs produced by FBI Agent Roger Martz from testing of Q204 (rear gate blood) in positive ion mode, plus a known EDTA control using Simpson's reference blood on cotton swatch (People's 544-A through 544-D). People's 544-E is a separate chromatography chart from the same back gate evidence showing the 160 and 132 ion peaks; Martz interpreted the results as showing no full daughter spectrum in the evidence stain, inconsistent with preserved blood, while Rieders disputed the interpretation. Raw full-daughter-spectrum data for the gate and sock stains was generated but subsequently destroyed and never printed.

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.

People's 544-A through DPeople's 544-E544-e

Source proceedings (4)

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

Criminal trial (4)

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A series of six photographs admitted in the criminal trial as People's 53 (sub-exhibits 53-A through 53-F), showing blood on the Bundy rear gate including a blood smear on the top rung, two droplets on the lower rung, and Item 117 on the outside of the gate.…
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Crime scene photographs, rear gate blood — People's 48 series (criminal trial)
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Photographs of the Bundy rear gate admitted in the criminal trial as People's 166 and People's 166-A. People's 166-A is a close-up of the rear gate taken on June 13, 1994, used by the defense to challenge whether blood drop 116 was visible on that date. Peop…
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🔬 Martz LC-MS/MS testing graphs of rear gate stain Q204 (People's 544 series)
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