Federal investigators are working to establish a motive in the murder of conservative activist Charlie Kirk, who was fatally shot while addressing students in Orem, Utah. The 31-year-old founder of Turning Point USA was killed on Wednesday, and 22-year-old Tyler Robinson has been accused of his assassination.

According to senior FBI officials, Robinson had been in a romantic relationship with a person transitioning from male to female, with whom he shared an apartment in St. George, Utah. The individual, identified as 22-year-old Lance Twiggs, is said to be cooperating with authorities and is not accused of any crime in connection with the killing.

The FBI is currently sifting through a large amount of evidence, including communications between Robinson and Twiggs, as well as connections to the shooting. Investigators have recovered text messages and Discord chats from the pair’s devices, which have provided key leads in the case. A Mauser .30 caliber bolt-action rifle and ammunition were also recovered, with some casings bearing slogans and memes, including references to anti-fascist ideology and LGBTQ culture.

Investigators are exploring whether Robinson was motivated by anger at Kirk’s criticism of the LGBTQ agenda and gender transition procedures. Utah Governor Spencer Cox has described Robinson as “deeply indoctrinated with leftist ideology,” although his family has insisted they are lifelong Republicans. The FBI has not publicly confirmed a motive, but is reviewing evidence and pursuing all connections related to the case.

Kirk’s murder has sparked a widespread investigation, with the FBI working to determine the circumstances surrounding the shooting. The case has also raised questions about the potential motivations behind the killing, and whether it may be linked to Kirk’s public views on LGBTQ issues. As the investigation continues, authorities are working to piece together the events leading up to the shooting and determine the extent of Robinson’s involvement.