Thomas Matthew Crooks, identified as the individual who attempted to assassinate former President Trump, was identified using advanced DNA and biometric technology. Despite having no prior criminal record and not carrying identification, authorities were able to confirm his identity through a rapid DNA test. The FBI, as reported by the New York Times, likely obtained a DNA sample from Crooks' family, who cooperated with the investigation. Crooks' car, reportedly found at the scene, may have led authorities to his family, who provided the DNA sample for confirmatory typing.