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

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 sitting on the high-profile case became privy to a slew of text message exchanges that showed a flirtation between the woman charged with killing her boyfriend and an ATF agent who was a friend of the dead man,

Jurors also heard from two people — Ryan Nagel and Heather Maxon — who arrived at 34 Fairview Road in Canton, where O‘Keefe’s unresponsive body was found, at the same time as Read and O‘Keefe did shortly after midnight on Jan. 29, 2022.

Among potential witnesses in the trial of Karen Read, a Massachusetts woman accused of ... “The defense's job is not to put forth its own theory, it’s to punch holes and the defense has done a good job of raising all kinds of questions.”