>> there were others with mr. monteith in his room earlier last night but video and fob key entries show him returning to his room by himself in the early morning hours. and we believe he was alone when he died. when he missed his checkout time, staff went to the room at noon and found his body. >> monteith actually checked into rehab in april for substance abuse problems. and that's not the first time the "glee" star had actually gone to rehab. he'd spoken openly in the past about his struggles with addiction. his autopsy is scheduled for monday to find out what happened. hollywood is mourning. he's known for playing fin hudson on the hit show "glee." he'd been dating his co-star lea michele. we have not heard from michele. they say we are deeply saddened