Following testimony, Judge Beverly Cannone will hold a hearing on defense expert witnesses who found that John O’Keefe’s injuries weren’t consistent with being hit by a vehicle.

A voir dire hearing is expected in the afternoon to vet two crash reconstructionists from ARCCA Inc. for Karen Read's retrial.

Karen Read pleaded not guilty to murder charges in the death of Boston police officer John O’Keefe and is facing a retrial after a jury was unable to reach a verdict last year. The trial is entering its second week as the prosecution continues to call key witnesses.