Karen Read is charged with second-degree murder, manslaughter while operating under the influence of alcohol and leaving the scene of personal injury and death. Read has pleaded not guilty to all charges.
Dashcam video from the night Boston police officer John O'Keefe was found dead was played in court, as first responders gave conflicting testimony about what they heard and saw
Karen Read's lawyers and prosecutors sparred on day one of Read's murder trial, which has become a years-long spectacle, including an alleged cover-up, after her Boston cop boyfriend was found dead