Twenty-one years after the famous 1995 murder trial of O.J. Simpson, new information has emerged about the mental state of one of the most famous running backs in football history - that Simpson nearly killed himself in Kim Kardashian's bedroom. Simpson was accused of killing his ex-wife Nicole Brown Simpson and her friend Ronald Goldman.

Lawrence Schiller, author of "American Tragedy: The Uncensored Story of the O.J. Simpson Defense," said in an interview with ABC's "20/20" that the former NFL player once tried to kill himself in the bedroom of the future reality superstar, the daughter of late Simpson attorney Robert Kardashian.

"He was recording this almost like a suicide tape," Schiller told 20/20 about a recording he obtained. 

"Oh boy, I don't know how I ended up here," Simpson says on the recording. "Please remember me as 'The Juice.' Please remember me as a good guy. Don't remember me as one of the negatives that might end up here. Please, please, please, please leave my kids at peace. I love everybody.

"That's what O.J. intended to be his final words," Schiller said.

Robert Kardashian walked in on Simpson sitting with a gun and photographs of his wife and kids soon after making the recording. Kim Kardashian was approximately 14 at the time and was staying with her father.

"Then O.J. said, 'I'm going to kill myself in this room,' and I said, 'You can't.' I said, 'This is my daughter's bedroom,'" Kardashian told Schiller at the time. "'My little girl Kim sleeps here. I can't have my little girl in this bedroom, and every time I come in here, I'm going to see your body lying in this. You can't do that,'" reports US Magazine.

Kris Jenner, Robert Kardashian's ex-wife and Kim Kardashian's mother, spoke to People about the murder of Nicole Brown Simpson and Goldman. 

"I will always feel guilty that I didn't pay more attention and didn't speak up when I thought anything was wrong or asked her more, 'Do you want to talk about it?' The one thing she would tell all of us by the time, you know, it got to that level was, 'He's going to kill me and he's going to get away with it,'" said Jenner, reports People.

The alleged suicide tape was recorded hours before Simpson was arrested. Simpson was charged with the murders, acquitted of all the criminal charges but later convicted of charges in a civil case.

Click HERE to read HNGN True Crime Correspondent Jon Leiberman's interview with Nicole Brown Simpson's sister Denise Brown about the case and why she withdrew from a planned documentary.