Judson Welcher also testified earlier in the day that Read's SUV reversed at 74% throttle around the time she's alleged to have hit O'Keefe.

Read's defense attorney questioned crash reconstruction expert Judson Welcher, one of the prosecution's key witnesses, without the jury present to determine his competency to testify and the ...

A crash reconstruction expert on Tuesday provided jurors his analysis of Karen Read’s vehicle the night her boyfriend was ...

Dr. Judson Welcher, an accident reconstructionist from Aperture LLC who is key to the prosecution's case, took the stand ...

A crash reconstruction expert has provided jurors his analysis of Karen Read’s vehicle the night her boyfriend was killed in ...

Karen Read, 45, of Mansfield, pleaded not guilty to second-degree murder and other charges. The prosecution says she hit her boyfriend, Boston police officer John O'Keefe, with her vehicle outside of ...

ABC News’ Olivia Rubin and civil trial attorney Tre Lovell report on the latest testimony in the Massachusetts courtroom.

The Karen Read murder retrial got back underway Tuesday after five days off for the sixth week of testimony, with the<a class="excerpt-read-more" href=" More ...

Karen Read and attorney Alan Jackson look at the empty jury box while listening to Judge Beverly Cannone during Read's murder ...