Kirk, Robinson's transgender partner possibly key to the crime

The housemate was 'shocked' when he heard about the killing from investigators and immediately shared the e-mails Robinson sent, the ones where he talked about the rifle wrapped in a towel being retrieved from the bushes near the University of Utah Valley.

But there are two other leads to investigate. The first is an alleged note or manifesto Robinson allegedly left before the bombing and which his partner allegedly discussed online with a friend. The other is the group chat on Discord revealed by the New York Times in which Tyler, after the murder, joked in a cold and macabre way with about twenty apparently unsuspecting friends, going so far as to claim that it was his double who had acted or that it was Charlie himself who had wanted to leave politics and had faked his death in order to live his dream life in Kansas.

In the chat Robinson shows that he is following the progress of the investigation, writing that it was better to 'get rid of this manifesto' and expressing scepticism about the initial information - which turned out to be unfounded - that spoke of transgender ideology on the bullet engravings: only the perpetrator could question this.

Investigators are also examining left-wing groups in Utah to see whether they had advance knowledge of the alleged bomber's plans or whether they provided him with material support afterwards.

One of these groups deleted its social media profile after the shooting, according to Axios. Utah's Republican governor, Spencer Cox, who was dispatched by the White House on three TVs to talk about the affair, also pointed to video game culture and the 'dark internet' as possible factors that would have contributed to Robinson's change of heart after he dropped out of Utah State University and returned to live in his parents' small town.

"Clearly there was a lot of online gaming, friends confirmed that there was this deep, dark culture of Reddit and other dark corners of the internet that this person was immersing themselves in. You could also see it on the casings... the 'memeification' that is happening in our society today,' he explained. Meanwhile, the political world continues to divide: the right, starting with the president, points to link Robinson to the ideology of the radical left, the Dems reject the accusations and point out that he came from a pro-Trump Republican family.