FBI Deputy Director Dan Bongino has said investigators are probing whether a "network of people" around the suspect accused of assassinating Charlie Kirk may have known about the attack in advance.

Kirk, 31, was fatally shot while speaking at Utah Valley University on September 10. Tyler James Robinson, 22, of Washington, Utah, was arrested on suspicion of aggravated murder and other felony offenses.

Bongino told The Megyn Kelly Show on Monday that it was "up in the air" how many people lived with Robinson, besides his partner Lance Twiggs .

"We have the suspect in this case and then we have Lance. How many people they associated with and how many in fact lived or resided there? It's up in the air," he said.

"However, there is apparently a network of people... given his network of fr

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