The husband of a Long Island woman murdered by a mentally disturbed man cannot proceed with medical malpractice claims against a mental health facility and a psychiatrist who treated the attacker, a Brooklyn-based appellate court has ruled.

On an August 2006 trip from the SLS Residential facility in Brewster to visit his mother in Glen Cove, Long Island, Evan Marshall killed and dismembered Denise Fox, a retired teacher who lived two doors away from his mother.