 Thank God he did. Secret Service snipers reacting quickly, firing at the shooter and killing him, but not before he was able to fire several shots, including the one that hit the former president. Authorities say the AR-style rifle used in the shooting was purchased legally by the suspect's father. Sources also say what appeared to be explosives were found in the suspect's car. One source saying they look like grenades. The FBI is working to determine if they're viable. A bomb squad was on the scene as the FBI searched the suspected shooter's home.