NEW: Tyler Robinson lived with transgender partner: report

"Charlie Kirk assassin Tyler Robinson lived with his transgender partner, sources tell me. The individual, who is a male transitioning to a female, is fully cooperating with the FBI," Singman posted.

The reporter added, "Sources tell me the FBI had texts and other communications between Robinson and the individual that helped FBI authorities solidify that Robinson was indeed the shooter."

The information was later confirmed by FBI officials.

Kirk was shot and killed on Wednesday when he was speaking to a group of students at Utah Valley University. Robinson, the prime suspect in the shooting, has been charged with murder and was turned in by his father to authorities.

Singman also posted about the last question Kirk was asked when he was shot. He has been talking about transgender mass shooters at the time.

“Do you know how many transgender Americans have been mass shooters over the last 10 years?” a student asked Kirk at the time. Kirk replied, "Too many."

Kirk was then asked if he knew the number of mass shooters there have been in general over the last 10 years. Kirk replied, "Counting or not counting gang violence?" He was then shot in the neck.

In the wake of the assassination, some in media and on the left have attempted to paint Robinson as a product of conservatism as well as his upbringing as a member of the Church of Jesus Christ of Latter-day Saints. However, he allegedly inscribed Antifa-linked slogans to the bullet casings that he used in the shooting and has not been actively participating in the church.

Utah Governor Spencer Cox has also said that he was “deeply indoctrinated with leftist ideology," an investigation into the suspected killer has revealed.