Nightclub murderer Omar Mateen was a follower of an imam who preached hatred of gays and who was recently released from prison — despite prosecutors warning that he had terror ties, according to a report. Mateen took lessons in the Islamic religion from Marcus Dwayne Robertson, a former gang leader from New York who now lives in Florida and who has been accused of helping terrorists, FoxNews.com reported. “It is no coincidence that this happened in Orlando,” a law-enforcement source told Fox. “Mateen was enrolled in [Robertson’s online] Fundamental Islamic Knowledge Seminary.”