Las Vegas casino mogul Steve Wynn suggested Sunday that Stephen Paddock would have set off alarm bells at his properties had he tried launching his mass murder from one of them.

Wynn, after whom the glitzy Wynn Las Vegas on the Strip is named, said his housekeeping staff is trained to do a visual inspection any time they enter a room, adding that a “Do Not Disturb” sign on a door for longer than 12 hours is investigated.

“The scenario that we’re aware of would have indicated that [Paddock] didn’t let anyone in the room for two or three days,” Wynn told “Fox News Sunday.” “That would have triggered a whole bunch of alarms here.”

Paddock and girlfriend Marilou Danley were regulars at Wynn’s resorts, visiting “once or twice a month,” the owner said.

Paddock launched his slaughter from the 32nd floor of the Mandalay Bay Resort.