Accused Charlie Kirk assassin Tyler Robinson is under “special watch” inside the Utah County Jail as he’s set to face charges of aggravated murder in the shooting of the conservative activist.

Bureau officials confirmed that Tyler Robinson, 22, was in a "romantic relationship" with the unnamed person, who is a male transitioning to a female, and that they shared an apartment in Saint George, Utah. Those FBI officials told Fox News Digital that Robinson's lover is fully cooperating with the FBI's investigation.

The suspected killer, 22-year-old Tyler Robinson, who lives in St. George, was apprehended at 10 p.m. Thursday night at his parent’s home in Washington, Utah, after a statewide manhunt and cooperation from friends and family who alerted authorities.

Tyler Robinson, 22, was ID’d as Charlie Kirk’s shooting suspect. A trans roommate cooperated with FBI, sharing texts about Robinson stashing the gun.

Erika Kirk, Charlie's widow, made her first public remarks since her husband's assassination. She stood behind a sign reading "May Charlie be received into the merciful arms of Jesus, our loving savior.

Charges are expected soon for Tyler Robinson the man suspected of killing Charlie Kirk, while Kirk's family and loved ones are making preparations for his funeral.

In the wake of the killing of conservative activist Charlie Kirk, vigils and gatherings to honor him have sprung up around the country.

Fox News correspondent Christina Coleman highlights celebrities' tributes to Turning Point USA founder Charlie Kirk on 'Fox Report.'