The FBI has concluded that Thomas Matthew Crooks acted alone in the assassination attempt on President Donald Trump. The investigation involved over 1,000 interviews in the U.S. and internationally, 10+ search warrants, more than 100 subpoenas, and analysis of 13 devices and 35 online accounts tied to Crooks and his family. Investigators found no foreign involvement, with Crooks having foreign email accounts but no evidence connecting him to foreign actors, organizations, or co-conspirators. Claims tying Crooks to a figure named William Tepes were investigated but showed no direct communication. Crooks left no manifesto and provided no explanation of motive, though his online posts showed some violent rhetoric (mostly from 2019–2020) but no coordinated planning with others. An undetonated explosive device was found in his vehicle; it could be remotely detonated but the receiver was turned off. Crooks used a .223 rifle, fired eight rounds, and had more ammunition in his vehicle. All rounds were accounted for, eliminating the “second shooter” theory. The FBI controlled and processed the crime scene thoroughly, collecting physical and forensic evidence. An autopsy was conducted and DNA collected before releasing the body to family. The FBI provided tens of thousands of pages of investigative documents to Congress. Leadership says they remain confident in the findings but will pursue any new credible leads. The article also notes limits on FBI monitoring of online activity due to First Amendment protections.