Prosecutors say Read, 45, backed her SUV into Boston police Officer John O’Keefe, 46, after dropping him off at a party hosted by a fellow officer in January 2022 and left him to die in the snow. Defense attorneys say she was a victim of a conspiracy involving the police and have suggested he was killed by someone inside the home.

Witness Jen McCabe was called to testify Tuesday afternoon, following lengthy testimony from a cellphone expert, in the retrial of Karen Read.