Article continues below advertisementRight-wing activist Charlie Kirk's alleged killer was terrified of what might happen once police closed in, according to authorities.Washington County Sheriff Nate Brooksby revealed in a press conference on Wednesday, September 16, that a former law enforcement friend tipped him off about the suspect, 22-year-old Tyler Robinson. The caller said Robinson admitted he feared being shot during a SWAT raid.Article continues below advertisementSource: Fox NewsTyler Robinson feared being shot by police before his arrest.