Thomas Crooks’ cousin recalled the gunman’s father, Matthew Crooks, doing everything in his power to keep the two ...

At the time of his death, Crooks, who had shown a gift for engineering projects, had been working on homemade explosives.

A monthslong investigation by CBS News punctures Thomas Crooks’ secrecy to reveal the broadest portrait yet of the lonesome ...

Thomas Crooks left no manifesto or explanation for why he tried to kill the former and future president in Butler a year ago. But a CBS News investigation is shedding light on his secret double life.

July 13 marks one year since the FBI said Thomas Crooks fired 8 rounds at Donald Trump and rallygoers, killing one man and grazing Trump's ear.