Following the shooting, authorities found bomb-making materials in the home of Thomas Matthew Crooks and also in his car, which was parked near the site of Saturday's Trump rally, the Associated Press reported.
The Wall Street Journal added that police had received multiple reports of suspicious packages near where Crooks was, prompting officials to dispatch bomb technicians.
Crooks lived in Bethel Park, Pennsylvania, a predominantly white, generally affluent suburb of Pittsburgh. Public records show he shared a home with parents who were licensed behavioural care counsellors. Those same records contain no mention of any criminal or traffic citations - nor any financial problems such as foreclosures.
Incongruous actions that Crooks took late in his time as a student at Bethel Park high school offered no hint at his political leanings. He was a junior at the school, and on the first day of Joe Biden's presidency Crooks donated $15 to the Progressive Turnout Project, a political action committee aligned with the president's Democratic party.
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