At least nine key witnesses remain for both the prosecution and the defense at Karen Read's second trial. Here's who they are.

The ongoing trial is Read’s second; her first murder trial ended in a high-profile mistrial last July after jurors returned deadlocked. Abby Patkin is a general assignment news reporter whose work touches on public transit, crime, health, and everything in between. She has been covering the Karen Read murder case.

Karen Read's defense team has long argued she was framed for John O’Keefe's death. Jennifer McCabe's testimony is central to the case.