Cop Kills Son, Mistaking Him for Intruder Off-duty officer Michael Leach was staying in motel By Mary Papenfuss, Newser User Posted Jul 23, 2012 12:43 AM CDT Updated Jul 23, 2012 12:51 AM CDT 44 comments Comments Michael Leach used his duty gun, said cops. (?ArtBrom) (Newser) – An off-duty New York police officer shot dead his own son, believing he was an intruder, he told investigators. Michael Leach, 59, was staying in an upstate motel over the weekend when he opened fire on his 37-year-old son, Matthew, of Rochester. Leach used his department-issued .45-caliber Glock in the shooting, said police. Leach was hospitalized afterward for an undisclosed "medical issue," state troopers told the Syracuse Post Standard. An investigation is continuing.