On Friday, the first day of Read’s defense, the jury heard from a vehicle data expert and accident reconstructionist who examined the findings of a pair of prosecution experts. The defense will call its next witness when the trial resumes at 9 a.m. Monday.

A medical doctor testified in the Karen Read murder trial that she believes wounds to John O’Keefe’s arm were “inflicted by a dog.”

Karen Read's re-trial continues with expert testimony on the wounds found on John O'Keefe and explicit text messages from the former chief investigator read out loud in the courtroom. NBC News' Stephanie Gosk explains the latest developments in the trial.