Charlie Kirk’s alleged shooter, Tyler Robinson, was living with a transgender partner who was in the process of transitioning from male to female, a law enforcement source confirmed Saturday. The individual, whose identity has not been released by authorities, is now fully cooperating with the FBI’s investigation into the high-profile killing of the conservative activist. The relationship was first reported by Fox News correspondent Brooke Singman.

According to investigators, communications between Robinson and the partner helped federal agents track down and arrest the accused assassin. Text messages and other app-based exchanges provided key details of Robinson’s alleged plans, including references to retrieving a rifle from a “drop point.” Officials said the transgender partner voluntarily showed investigators the incriminating messages that had been saved under the contact name “Tyler.”
Court documents reveal that some of the messages also described disturbing engravings Robinson allegedly etched into bullet casings.

Investigators claim Robinson engraved the casing of the bullet that killed Kirk — along with three additional casings — with taunting inscriptions. One read: “Hey fascist! catch!”
Robinson, 22, is now facing federal charges in connection with the fatal shooting, which has shaken conservative circles nationwide. Authorities continue to investigate whether Robinson acted alone or was connected to a broader network, but they say the cooperation of his former partner has been instrumental in piecing together the case.

The shocking details of the case — from the personal relationship Robinson maintained to the macabre engravings on the bullets — are painting a picture of a calculated and deeply disturbing crime against one of the country’s most prominent conservative voices.