The Karen Read trial resumed Tuesday with a 19th day of witness testimony inside Norfolk Superior Court in Dedham, Massachusetts. Forensic analyst Shanon Burgess was back on the stand for nearly the entire day for more cross-examination over his report on data from Read's Lexus SUV on the night prosecutors say she hit and killed John O'Keefe.

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.

Texas-based Shanon Burgess, of the accident reconstruction, biomechanics and digital forensics company Aperture LLC, returned to stand Tuesday morning for another round of intense questioning.