Kelly Dever

Officer Kelly Dever was assigned to the Canton Police Department dispatch room on the overnight shift of January 28–29, 2022, the night John O'Keefe was found dead outside 34 Fairview Road. In August 2023, she told law enforcement agents that she had seen Brian Higgins and Canton Police Chief Kenneth Berkowitz enter the Sallyport together and alone with the SUV — a statement with potential significance to the defense's evidence-tampering theory. By the time she testified in Trial 2, Dever had retracted that account, testifying that new factual information had convinced her the memory was false. Her testimony also encompassed a contested claim that defense attorneys threatened her with perjury charges during a pre-trial phone call, and the unusual circumstance of Boston Police Commissioner Michael Cox summoning her personally to his office before trial.