BOSTON — A doctor testifying as a dog bite expert was cross-examined by prosecutors Tuesday in Karen Read 's second murder trial, as the defense argues she was framed for killing her boyfriend, Boston Police Officer John O’Keefe, and that wounds on his arms came from an animal.

Read, 45, is accused of fatally striking O’Keefe with her SUV and leaving him to die in the snow outside another officer’s home when she dropped him off at a party in January 2022 after the two had been drinking. She's charged with second-degree murder , manslaughter and leaving the scene outside Boston.

Her lawyers say O’Keefe, 46, was beaten inside the home, bitten by a family dog and then left outside as part of a conspiracy by the police that included planting evidence against Read.

A mistrial was decla

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