Karen Read attorney Alan Jackson alleged Boston Police Officer Kelly Dever's credibility was “irreparably compromised” given her testimony.

Boston Police Commissioner Michael Cox says he “didn’t know” that one of his officers was associated with the Karen Read case, contradicting his subordinate, who testified in the retrial that he ...

Former Canton patrol officer Kelly Dever was called to the stand in the retrial of Karen Read, the woman accused of hitting her former boyfriend and police officer John O'Keefe with her vehicle ...

Boston Police officer Kelly Dever, formerly with Canton Police, testifies during the murder retrial of Karen Read in Norfolk Superior Court, in Dedham, Mass., Monday June 2, 2025.

Kelly Dever, a current Boston police officer, was called to the stand by Read’s defense team on June 2. She was working dispatch for the Canton Police Department when John O’Keefe was found dead.

The letter, addressed to Boston Police Commissioner Michael Cox and obtained exclusively by 25 Investigates, alleges Officer Kelly Dever’s credibility is “irreparably compromised”.

Boston Police officer Kelly Dever, formerly with Canton Police, testifies during the murder retrial of Karen Read in Norfolk Superior Court, in Dedham, Mass., Monday June 2, 2025.