The gunman who killed at least 50 people at an Orlando nightclub early Sunday was described by a former colleague as an "unhinged and unstable" person who repeatedly made racist, misogynist and homophobic remarks. Daniel Gilroy, a former police officer, worked as a security officer with G4S Security at the PGA Village complex in Port St. Lucie. Pulse nightclub shooter Omar Mateen worked the shift right after Gilroy at the complex's south gate. Gilroy described Mateen as a devout Muslim who brought a prayer mat to work and prayed several times a day. "There was never a moment where he...