She’s not holding back!

Caitlyn Jenner is telling all in her new book titled The Secrets of My Life, and surprisingly, she’s taking a major stance on the O.J. Simpson trial, claiming Kris Jenner’s late ex-husband Robert Kardashian Sr. knew friend O.J. was guilty of the murders of Nicole Brown Simpson and Ronald Goldman.

MUST SEE: Robert Kardashian Sr. Thought O.J. Simpson Was Khloé Kardashian’s Father!

kris jenner oj simpson

In excerpts obtained by Radar Online, the former Olympian revealed that the late attorney secretly confessed that he didn’t believe in the football star’s innocence.

"I would've been okay with it if they had gotten him in the first trial," the Keeping Up With the Kardashians star claimed her ex-wife’s ex-husband said at the time.

MORE: Caitlyn Jenner Reveals She Wants a Baby!

"The implication was obvious that he believed O.J. was guilty," the 67-year-old went on to explain. “[O.J] was the most narcissistic, egocentric, neediest a–hole in the world of sports I had ever seen, and I had seen a lot of them."

Cait also gave insight into how the Kardashian family as a whole felt about the murders.

robert kardashian tb

"I believe he got away with two savage murders," the gold medalist wrote.

However, the father-of-six claimed that there was a divide in the family’s opinions as stepdaughters Kourtney Kardashian and Kim Kardashian sided with their father, believing their “Uncle O.J.” was innocent, and ex-wife Kris Jenner sided with her late friend Nicole.

"'See, I told you he didn't do it!'" Cait recalled Kourtney saying as a child as the results of the trial were released.

The I Am Cait star didn’t stop there, claiming that Robert’s main drive for defending the NFL star was his jealousy of Kris leaving him for Caitlyn, then Bruce Jenner.

“I wonder if it was his way of saying to her what I think she was saying to him when she married me: a big f–k you,” she revealed.

Something tells us we’re gonna want to get our hands on a copy of this book!