A woman is dead and a man is in critical condition after a shooting on Staten Island that police are investigating as an attempted murder-suicide, sources tell The Post. Cops from the NYPD’s 122 Precinct were dispatched to a home in Garth Court on reports of a shooting shortly after 11 a.m. on Thursday and made the grisly discovery, the sources said. Inside the house, police found a 39-year-old woman with a gunshot wound to the torso and a 27-year-old man with a head wound, according to police.