Here’s what has happened so far in the Karen Read murder trial CBS BostonJen McCabe, key witness in Karen Read trial, returns to stand: Watch live NBC BostonWatch Live: Karen Read murder trial testimony Day 15 begins with Jennifer McCabe cross-examination CBS Boston‘Polished, assertive, on the attack’: What to know about Karen Read’s trial style Boston.comKaren Read trial: ‘I hit him’ statements come under questioning MassLive.com