DEDHAM, Mass. -- Jurors in Karen Read's second murder trial watched a test dummy repeatedly get struck by an SUV Friday as a crash reconstruction analyst testifying for the defense contradicted previous testimony about her vehicle and her boyfriend's fatal injuries.

Read, 45, is accused of fatally striking Boston Police Officer John O'Keefe and leaving him to die in the snow outside another officer's home after a night of drinking in January 2022. She's charged with second-degree murder, manslaughter and leaving the scene outside Boston.

Her lawyers say O'Keefe, 46, was beaten inside the Canton 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 declared last year and so far, Read's second

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