Dr. Judson Welcher said he believes the damage to Read’s SUV and relevant data was “consistent with a collision” with O’Keefe as long as the vehicle was moving faster than 8 miles per hour.

Karen Read and attorney Alan Jackson look at the empty jury box while listening to Judge Beverly Cannone during Read's murder trial in Norfolk Superior Court in Dedham, Mass., Wednesday, May 21, 2025. (Greg Derr/The Patriot Ledger via AP, Pool) AP