Marilyn Monroe got into a heated argument with President John F. Kennedy and his younger brother Bobby on the day she died where she complained about being "passed around like a piece of meat," according to a private detective's files.
Fred Otash, an infamous Hollywood private investigator who died in 1992, installed bugging devices in Monroe's Los Angeles home and kept detailed notes on the recordings.
"I listened to Marilyn Monroe die," Otash claimed in one file. He declared in another that he even overheard the bombshell having sex with JFK.
Urgent: Is Obama Telling the Truth on IRS, Benghazi Scandals?
His files have now been uncovered by his daughter Colleen
, who found them in an old storage unit, according to the Daily Mail.
According to Otash, Monroe had a sexual relationship with the Kennedy brothers and got into a violent argument with them both on Aug. 5, 1962 — the day she died of a drug overdose.
"She was really screaming and they were trying to quiet her down," Otash wrote in his notes. "She's in the bedroom and Bobby gets the pillow and he muffles her on the bed to keep the neighbors from hearing. She finally quieted down and then he was looking to get out of there."
Otash, who was used as character inspiration for Jack Nicholson's role in the 1974 film "Chinatown," was one of the most sought-after PI's in Hollywood. He had established his own bureau in L.A. where he fact-checked for a celebrity gossip magazine called Confidential.
Otash's other celebrity scoops include Rock Hudson, Bette Davis, and Judy Garland.
Editor's Note: Get the Navy SEALs Cap – Celebrate Our Heroes
"I was shocked when I met Judy Garland the first time," Otash wrote in his 1976 autobiography, "Investigation Hollywood." She was no longer the little girl I remembered but a grown woman, puffy-faced and more than a little plump... I was only in Judy's house a couple of days when I realized that she was taking something. I wasn't sure if she was using narcotics or boozing it up. But she was obviously out of it most of the time."
Secret Service: JFK Met Marilyn Monroe at Justice Dept. for Sex
FBI Removes Many Redactions in Marilyn Monroe File
NBC Channels Marilyn Monroe in Super Bowl Ads to Aid Network
© 2016 Newsmax. All rights reserved.