Among key arguments in Read’s defense is that the injuries on John O’Keefe’s arm were marks from an apparent animal attack.

After seven days and 12 witnesses, it is clear Karen Read's second trial is very different from the first. "I think it's vastly different really," said WBZ Legal Analyst Katherine Loftus. Loftus watches every minute of testimony and helps break down the big legal takeaways,

Jennifer McCabe, a key witness in the retrial of Karen Read for the killing of her boyfriend John O’Keefe, recalled what Read told first responders after O’Keefe died. McCabe, is a central figure – to both the prosecution and the defense – in the case against Read,