Where is Lamar Odom? That seems to be the question everyone from media outlets to family members are asking. In the past couple days the former Clippers player has constantly made headlines as he struggles to deal with an alleged cocaine addiction.

Following his DUI arrest there were several reports that Odom was given an ultimatum by his wife Khloe Kardashian. She told her husband he needed to get help for his addiction or the marriage was over, TMZ reports.

Now, there are rumors that Odom checked himself into rehab on Sept. 4 but walked out after only one day. Kardashian and his family had no idea of his plan to get help and have been left in the dark about his exact whereabouts, Hollywood Life reports.

A family source told the website that they are "worried sick" about the athlete and haven't heard from him or seen him in the past 24 hours.

"We hope he's all right but like Khloe and the rest of his family, [as far as we know] he's a gone ghost," the family member said. "We're all worried sick because it's been at least a day and a half and he hasn't called us."

"Khloe doesn't know where he is, he's just gone," the family member continued. "We hope he really is in rehab but if he's not we worry he's doing something dangerous to himself. The last thing we want to hear is a detective calling telling us the worst news in the world."

He reportedly checked into Robert Shapiro's rehab center in Los Angeles but left the next day. Another source told Hollywood Life that "Lamar isn't ready [for treatment]."  

TMZ is reporting an entirely different story and claims the athlete never checked into rehab but simply disappeared and nobody knows where he is at.