On Monday, prosecutors in Karen Read’s retrial called a forensic cell phone expert who testified that John O’Keefe’s phone likely stopped working around 12:32 a.m., with battery temperature and location data suggesting he never made it inside the house. The testimony could undercut the defense’s claim that O’Keefe, Read’s boyfriend and a Boston police officer, was injured during a party, not outside. https://www.cbsnews.com/boston/news/watch-live-karen-read-trial-day-5-arcca/ | CBS Mornings