New Delhi, Sept. 16 -- Tyler Robinson, a 22-year-old Utah native, who was arrested in connection with the fatal shooting of conservative activist Charlie Kirk, allegedly had an "obsession" with Kirk, according to FBI Co-Deputy Director Dan Bongino. The shooting occurred on September 10 during an outdoor event at Utah Valley University.

Bongino also told Fox News that Robinson displayed "multiple warning signs" prior to the shooting.

"I believe co-workers stated he had detached himself when the topic of politics came up and walked away," Bongino said.

Authorities are investigating whether anyone was aware of Robinson's intentions and failed to report them. Bongino noted that online chats Robinson allegedly had about Kirk are part of the...