Who is Gabriel Dewitt Wilson, the shooter at a West Hempstead Stop & Shop? Updated: 20 Apr 2021, 20:27 Invalid Date, ONE victim is dead and two others wounded after a shooter opened fire in the manager's office of a Long Island Stop & Shop the afternoon of April 20. The triggerman has been identified as Gabriel Dewitt Wilson, who reportedly fired several shots in the manager's office located in the building's second floor. 4 An active shooter warning has been issued in West Hempstead in Nassau County, Long IslandCredit: news 12 Who is Gabriel Dewitt Wilson, the shooter at a West Hempstead Stop & Shop? As of 3:15pm Tuesday, April 20, the Nassau County Police Department have confirmed Wilson, 31, was in custody.