Geraldo Rivera has been removed from Duquesne University's panel on the 50th anniversary of John F. Kennedy's assassination. According to Duquesne, a topless selfie that Rivera posted on Twitter two months ago caused the university to revoke its offer.

In July, Fox News commentator Rivera posted a picture of himself that he took with his cell phone showcasing himself with nothing but a white towel covering his unmentionables. The photo was a proud self-portrait for his birthday.

"70 is the new 50 (Erica and family are going to be so pissed...but at my age...)" the caption said.

The celebratory photo, however, caused Duquesne to remove Rivera from its panel.

"Just heard Duquesne Univ cancelled my appearance at JFK assassination panel because of 'selfie'. Fact I first aired Zapruder film less impt," Rivera said via Twitter.

In 1975, Rivera was the first to a show bootleg video showing Kennedy's assassination. The footage was a copy of Abraham Zapruder's home video.

Still, Duquesne was not pleased by Rivera's actions and requested that the Cyril H. Wecht Institute of Forensic Science and Law, who is sponsoring the panel, to rescind their invitation to Rivera.

"The administration felt that Mr. Rivera's decision to post a nearly naked picture of himself on social media was inappropriate and inconsistent with who we are as a Catholic university and therefore asked the Wecht Institute to withdraw the invitation," Bridget Fare, a Duquesne University spokeswoman, said an interview with the Pittsburg Post-Gazette. "We warn our students not to put anything inappropriate on social media because of potential consequences -- you could consider this teaching by example."

This is not the first time Rivera has received criticism for the picture. After the upload, the response was so negative that Rivera defended himself on Twitter by claiming that he was "harmlessly showing off."

Cyril Wecht, chair of the institute's advisory board, expressed remorse at the situation.

"I am disappointed," she said in an interview with the Pittsburg Post-Gazette. "You've got a 70-year-old man with a bath towel around his waist, although granted, it was below the umbilical level. You go to a beach, there are people running on the streets every day, guys in their shorts. How could this bother Duquesne?"

According to POLITICO, Rivera was going to speak at Duquesne for free.

Rivera released this statement to POLITICO on Monday:

As a Catholic university, I hope the administration of Duquesne over that period was as diligent in condemning real outrage as it has been in censoring my appearance on the JFK panel because of a 'nearly naked picture.'

Are all prospective speakers similarly scrutinized, or is my sin receiving special attention? Does the 'selfie' over-weigh my Peabody, Emmys, RFK's and other professional achievements on Duquesne's scale of morality? Are the students of Duquesne so sensitive and protected that they will be unable to concentrate on the topic being discussed because they cannot unsee the image?

Further, the process of cancellation was incredibly rude. I was informed last week by a stranger, who introduced himself to me at a hotel bar, only to then tell me that he was on the JFK panel but that it was too bad my appearance had been cancelled because of the offending tweet..."

Rivera was to serve a moderator for a panel of journalist who would discuss how media would have covered Kennedy's assassination today. Oliver Stone, director and co-write of the 1991 film JFK was added to panel after the removal of Rivera. The panel will be held at three-day conference which begins Oct. 17.