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

A Boston police officer's testimony in Karen Read's trial raises questions of coercion, as the defense seeks to undermine the investigation into John O'Keefe's death.

Karen Read defense attorney Alan Jackson and former Canton Police Officer Kelly Dever had a combative back-and-forth Monday.

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

Boston Police Officer Kelly Dever worked at the Canton Police Department the morning Karen Read and two other women found John O'Keefe dead in the Beantown suburb -- but she did not investigate ...

Boston Police Commissioner Michael Cox was asked Thursday for the first time about references to him and his department during testimony in the Karen Read trial.