Omar Mateen and his wife, Noor Zahi Salman, visited Walt Disney World in April, the source says. Salman told federal authorities on Sunday that her husband had more recently been “scouting Downtown Disney and Pulse [nightclub] for attacks.”

Metal detectors have been installed outside Magic Kingdom, Hollywood Studios, Animal Kingdom and Epcot since 2015 and guests are selected at random for screening. However, unlike the main four Disney World theme parks, Downtown Disney doesn’t have security and bag check before entry.

At least four regular customers at the gay Orlando nightclub where Mateen killed 49 people Sunday morning said today that they believe they had seen the killer, Omar Mateen, there before. This connects to Salman’s statement that her husband was actively scouting locations

“Sometimes he would go over in the corner and sit and drink by himself, and other times he would get so drunk he was loud and belligerent,” said Ty Smith.