Secrets in the Snow: The Murder Retrial of Karen Read

This week, "IMPACT x Nightline" reports on the retrial of Karen Read, who is charged with the 2022 murder of her then-boyfriend, Boston police officer John O'Keefe. After a shocking deadlocked jury in Read's first trial that took place in 2024, she is back in court as the second trial begins. ABC News sits down with those close to the case to learn more about what happened that snowy night.