A Boston police officer who testified at Karen Read ’s second trial this spring resigned from the department effective Sept. 1, months after she took medical leave.

Officer Kelly Dever’s t estimony at the Read trial was marked by a number of tense exchanges with Alan Jackson, the lawyer who headed Read’s defense. Dever worked for the Canton Police Department when the body of Read’s boyfriend, Boston Police officer John O’Keefe, was found on the front lawn of a fellow officer’s Canton home.

“The resignation of Police Officer Kelly Dever, ID# 173471, assigned to BAT/Leave of Absence Section, Org. #36135, after being presented, is hereby effective September 1, 2025,” reads a personnel order released by the department Friday.

On the stand, Dever explained that her recollection to the

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