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

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

Documents obtained by CBS News shed light on Thomas Matthew Crooks, the 20-year-old who opened fire at a Trump rally in ...

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 ...