Andrew Rentschler testifies on the injuries John O'Keefe received when he died at the Karen Read retrial, Tuesday.© Matt Stone/Boston Herald/TNS ...

Andrew Rentschler, a biomechanical engineer and accident reconstructionist from ARCCA, began testifying on Tuesday and returned to the stand on Wednesday for the 31st day of testimony in Read’s ...

Wednesday featured a tense cross examination, with Special Prosecutor Hank Brennan sparring with the defense’s crash expert, Dr. Andrew Rentschler from ARCCA.

Andrew Rentschler testifies on the injuries John O'Keefe received when he died at the Karen Read retrial, Tuesday, June 10, 2025, in Dedham, Mass.

Andrew Rentschler, a biomechanist and accident reconstruction expert, delivered potentially critical testimony about his analysis of O’Keefe’s head, brain and body injuries.

Andrew Rentschler, a biomechanist and accident reconstruction expert, is expected to testify about his analysis of what caused Boston police officer John O’Keefe’s head, brain and body injuries.

Andrew Rentschler, a biomechanical engineer and accident reconstructionist from ARCCA, began testifying on Tuesday. Crash expert says damage to the SUV and clothing are inconsistent with a collision ...

Flint McColgan - Boston Herald (TNS) Jun 10, 2025 Updated Jun 10, 2025 ...