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.

Karen Read’s defense is set to call its first witness on Friday, marking a new phase in her retrial in the killing of John O’Keefe, her off-duty Boston police officer boyfriend whose body was found buried in the snow outside a home in Canton,

The live Karen Read trial is being watched closely by crime junkies, including people who think the former adjunct professor is innocent in the death of her boyfriend, John O'Keefe. The prosecution rested its case, and Read's defense was poised to present its own on May 30, 2025.

Karen Read told reporters Thursday the defense’s first witness will be Matthew DiSogra, an expert in vehicle data.

Karen Read’s defense team will begin callings its own witnesses after the prosecution rested its case Thursday. Follow the proceedings in the live video here.

Prosecutor Adam Lally called Andre Porto and Ash Vallier, analysts at the State Police crime lab, to the stand. Here's how the day unfolded.