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.

Jurors heard expert testimony on the search for how long it takes to die in the cold was made. Read allegedly left her boyfriend to die in the snow.

Forensic expert Jessica Hyde testified about Jennifer McCabe's disputed Google search at the Karen Read trial Wednesday.

A defense attorney in Karen Read’s second murder case on Friday grilled a top police investigator about delays in booking critical evidence connected to the death of Read's boyfriend, a