Karen Read, the woman charged with killing Officer John O'Keefe in January 2022, speaks with "Nightline" and maintains she had no part in his death. WATCH NIGHTLINE EPISODES: https://abc.go.com/shows/nightline ALSO AVAILABLE ON HULU: https://hulu.tv/2wSmSrZ #nightline #murdermystery #crime #police #investigation #abcnews