Author James Patterson believes Marilyn Monroe was killed—here's why

James Patterson, who has a soon-to-be-released autofiction on the life and death of Marilyn Monroe, said he believes that the Hollywood icon was murdered.

In an interview with The Hollywood Reporter, he pointed out that the late star was “treading in very dangerous waters.”

“She had these incredible relationships with President Kennedy, and with Robert Kennedy, and with Sinatra, and with Mafia figures. They told her stuff, and she kept track of it. She had information that was kind of dangerous,” Patterson told the outlet.

"A lot of people don’t know the story," he added. "There’s a lot of stuff I didn’t know."

The American author added that there are still a lot more to know about Monroe's death, including comments from one of the detectives assigned to her case.

"The 11 foster homes. The fact that she had a pretty bad stutter when she was a kid, I didn’t know much about the death scene, about the autopsy not being as complete as it should have been, that one of the detectives was convinced the scene was staged," he continued. "The key is a lot of people know about her a bit, but not that much. You’d be surprised."

Patterson made the claim ahead of the release of his new book, The Last Days of Marilyn Monroe: A True Crime Thriller.

Monroe died on Aug. 5, 1962. Her death was ruled a probable suicide "caused by a self-administered overdose of sedative drugs," according to Los Angeles authorities.