Thomas Matthew Crooks, the 20-year-old Pennsylvanian who attempted to assassinate Donald Trump in July, was in the process of ...

Law enforcement officials were working Sunday to learn more about Thomas Matthew Crooks of Bethel Park, Pennsylvania, to determine what motivated him to open fire on the rally from a nearby ...

Thomas Matthew Crooks, who attempted to assassinate now-President Donald Trump in July, was in the process of designing a ...

Emails and essays obtained by CBS News shed new light on Thomas Matthew Crooks, the 20-year-old who opened fire at a Trump ...

Emails and essays obtained by CBS News shed new light on Thomas Matthew Crooks, the 20-year-old who opened fire at a Trump ...

The father of Thomas Matthew Crooks, Donald Trump's would-be assassin, called police out of concern for his missing son hours after the July 13 shooting occurred in Butler, Pennsylvania ...

Allegheny Arms & Gun Works previously violated multiple federal firearm sale regulations.

The gunman who carried out an attempted assassination on Donald Trump at a rally has been identified by the FBI as Thomas Matthew Crooks. The 20-year-old resident of Bethel Park, Pennsylvania ...

The USSS testimony was regarding the assassination attempt on Donald Trump at a Pennsylvania rally on July 13 which left two people, including the 20 year-old shooter Thomas Matthew Crooks ...

On the other side of the country, another would-be assassin Thomas Matthew ... gunman Thomas Crooks and sent it to other law enforcement officials at the scene of Donald Trump's Pennsylvania ...

Investigators said Crooks, 20, made his way atop of a building in Butler, Pennsylvania, last month by climbing from a large air conditioning unit onto the roof of an adjacent building. The FBI said ...

The family of Thomas Matthew Crooks has retained ... Neighbors of the Crooks family in Bethel Park, Pa., told The Post that things have gone mostly back to normal on their quiet street after ...