Skip to content
Dzhokhar Tsarnaev— Case Archive
personpersonMichael CashmanMichael CashmanMassachusetts State Police trooper assigned to the Middlesex County District Attorney's Homicide Unit.← All People
Law enforcementMassachusetts State Police

Michael Cashman

Massachusetts State Police trooper assigned to the Middlesex County District Attorney's Homicide Unit.

Appeared2015 Federal Trial
79 lines·1 proceeding·1 mention

About

Michael Cashman testified for the prosecution on Day 32 about his work investigating Sean Collier's killing. The Massachusetts State Police trooper described MIT surveillance showing figures approaching Collier's cruiser and leaving toward Ames Street around 10:26 p.m., followed by a nearby recording showing a car at 10:26:56 p.m.

Cashman explained that investigators returned a green Honda Civic recovered from Laurel Street to the scene and drove it along Ames Street several times to record comparison footage from the same camera angle. He clarified that the reenactment matched the lighting, not the exact time, and said the side-by-side images appeared to show the same vehicle. The court confirmed that the reenactment video had already been admitted, and two comparison stills were admitted without objection.

Cashman also testified that he obtained a warrant for a blood sample after the defendant's arrest. He authenticated photographs of three blood tubes, his sealing markings, and packaging received from the hospital laboratory, but gave no laboratory results. The photographs were admitted without objection. Defense counsel asked no questions.

Trial Record (1)

2015 Trial2015 Federal TrialJan 5, 2015 – Jun 24, 2015Called by prosecution

Michael Cashman testified about a surveillance comparison in the Sean Collier killing investigation, saying images of a recovered Honda Civic appeared to match the recorded car. He also authenticated photographs of blood-sample tubes and packaging without presenting laboratory results.

Day 32

DirectMichael Cashman — DirectMichael CashmanWilliam D. Weinreb5highlightsMentioned79lines spoken

Summary

Cashman compared surveillance footage with a reenactment using the recovered Honda and authenticated blood-sample photographs.

Mentioned in this proceeding.

Highlights (5)

testimony highlightCashman explained that investigators drove the recovered Honda through the same camera view for comparison. He clarified that the reenactment used the same lighting, not the same clock time.Open in transcript →
Quote“Myself and other investigators had the Honda towed back to the scene. It was in operable condition. And we -- roughly the same time of night to get the lighting correct, we drove the Honda down Ames Street several times to use the same camera of this same angle to get a comparison view to compare side by side.”— Michael CashmanExplains how investigators generated the comparison footage used to assess the surveillance vehicle.Open in transcript →
Quote“It's not the same time but it's the same lighting.”— Michael CashmanQualifies counsel's suggestion that the reenactment occurred at roughly the same time.Open in transcript →
testimony highlightThe reenactment still, Exhibit 1459, was admitted without objection. Comparing it with Exhibit 1458, Cashman said the vehicle appeared to be the Honda abandoned on Laurel Street.Open in transcript →
Show all 5 highlights
evidence eventCashman authenticated photographs of three blood tubes and their packaging. The photographs were admitted without objection; counsel's correction of the first photograph's number to 1519 differed from the admission notation's 1591.Open in transcript →