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.

John O'Keefe's injuries immediately pointed to a vehicle strike, a Massachusetts State Police sergeant testified Thursday.

Hannah Knowles, a member of the Massachusetts State Police crime lab, is expected back on the stand Monday morning to continue her testimony about Karen Read's blood alcohol level the night of John O' Keefe's death.

Evidence about a prior fight between Karen Read and John O'Keefe may be allowed in court after defense team's questioning created an opening for prosecutors.

Jurors in the Karen Read murder trial on Wednesday heard testimony about physical evidence collected from the crime scene and a digital forensic analysis of contested data from the cellphone of a key witness.

Karen Read accused John O'Keefe of cheating on her on a trip to Aruba in 2021. Prosecutors want the jury to hear more about the incident.