James Lesure's exit from "Blue Bloods" as DA Investigator Alex McBride remains a mystery. McBride appeared in seven episodes before disappearing without explanation. Fans have speculated about his departure on Reddit threads, with some mistakenly believing he was killed off. Lesure went on to star in the short-lived sitcom "Uncle Buck" and has since appeared in various TV shows, including "Girlfriends' Guide to Divorce," "Salvation," and "Good Girls." He also had roles in "Rebel" and "Winning Time: The Rise of the Lakers Dynasty." Lesure joined "The Rookie: Feds" as FBI Agent Carter Hope and may return if the show is renewed.