 Former President Donald Trump, the FBI said Sunday it was investigating the assassination attempt as a potential act of domestic terrorism, but the absence of a clear ideological motive by the man shot dead by the Secret Service has led conspiracy theories to flourish. The FBI says it believes Crooks acted alone and had bomb-making materials in the car he drove to the Republican ex-president's Pennsylvania rally. Crooks graduated from high school in 2022. Record show Crooks was registered as a Republican.