ORLANDO, Fla. – Pulse nightclub gunman Omar Mateen’s father, Seddique Mateen, was an informant for the FBI for more than a decade before the 2016 mass shooting and is facing a criminal investigation in connection with money transfers to Turkey and Afghanistan. … Mateen made at work in 2013 about belonging to terrorist organizations. Defense lawyers for Noor Salman, Omar Mateen’s widow, argued the case against her…