Prosecutors are retrying Karen Read for the murder of her boyfriend, John O’Keefe, who was found unresponsive outside a fellow officer’s home in January 2022. The prosecution alleges Read struck O’Keefe with her vehicle after an argument, while her defense contends he was likely harmed inside the home of Brian Albert, who has not testified in the retrial. Key evidence includes O’Keefe’s iPhone data, which the prosecution claims shows he never entered Albert’s home, contradicting the defense’s narrative of events surrounding the incident.