He went on to explain how the FBI tracked down the suspect, saying the agency acted on a tip from a family member of Robinson. The relative contacted a family friend, who then reached out to the Washington County Sheriff’s Office.
Fox News senior White House correspondent Jacqui Heinrich revealed that sources told her the suspect was “walked in” near St. George, Utah, after 11 p.m. Thursday.
A mugshot of Robinson was also released, giving the public a clearer picture of the man who has been the subject of intense speculation over the past 48 hours.

According to Cox, the tipster revealed that “Robinson had confessed to them or implied that he had committed the incident.”