Lamar Odom "seemed sad" on Sunday, the brothel owner Dennis Hof tells PEOPLE

Credit: Getty (2)

Before Lamar Odom was found unresponsive at a Nevada brothel on Tuesday, the former NBA star had been in “high spirits” according to the owner of the Love Ranch South in Pahrump, where he was staying.

Dennis Hof – who confirms Odom checked in on Saturday Oct. 10. – tells PEOPLE: “Lamar called us wanting to come out and visit and get away from all the pressure and have some fun. He was having a good time, happy and healthy.”

However, Hof adds that by Sunday, Odom – who has had a long history of drug and alcohol abuse – “seemed a little sad” but had shown no other signs that anything was wrong.

“We don’t know why he seemed a little sad, but he had been in good health and high spirits, laughing and giggling,” Hof says. Two girls who work at The Love Ranch, Ryder Cherry and Madison, had seen Odom go to sleep around 6 a.m. in the early hours of Tuesday morning.

“They came back around 3 p.m. and he was unconscious, so they immediately called 911,” he adds. A statement from the Nye County Sheriff confirms that a call was made at approximately 3:15 p.m. “They told them to place him on his side, that’s when they saw a bunch of stuff coming out of his mouth. An ambulance picked him up, took him to a Nevada hospital. My people said to me “It’s not looking good, he might not make it”

Sources tell PEOPLE that Odom’s ex-wife Khloé Kardashian has been informed of his condition, which is described as serious.

Hof adds: “We [told cops] he wasn’t taking any illicit drugs, he did take herbal Viagra, but that’s the thing with addicts you never know because they hide things. He was just trying to have a good time and get away from all the attention.”