Who was Thomas Matthew Crooks?

The gunman who attempted to assassinate former President Donald Trump at a Pennsylvania rally on Saturday has been identified by the FBI as Thomas Matthew Crooks, a 20-year-old from Bethel Park, Pennsylvania, but authorities have not released any additional information about him.

“This is an active and ongoing investigation,” the FBI said in a statement released early Sunday.

The shooter had no criminal history in public Pennsylvania court records, and authorities said they had not identified a motive. A voter registration record showed Crooks was registered as a Republican, though federal campaign finance records show he donated $15 to the Progressive Turnout Project, a liberal voter turnout group, through the Democratic donation platform ActBlue in January 2021.

Early Sunday morning, law enforcement had closed all roads leading to the suspect’s family home in Bethel Park, south of Pittsburgh and about an hour’s drive from the rally site in Butler. Multiple relatives did not respond to messages seeking comment.

The Secret Service said Crooks was killed after firing from “an elevated position” outside the outdoor rally where Trump was speaking. Law enforcement found an AR-15-style semi-automatic rifle near the body of a white man they believe to be the shooter, according to two law enforcement officials.

Crooks appears to have graduated in 2022 from Bethel Park High School, which has about 1,400 students, and received a $500 “star award” from the National Math and Science Initiative that year, according to The Tribune-Review in western Pennsylvania.

In an online recording of the 2022 graduation ceremony, Crooks can be seen walking across the stage to modest applause after his name was called, a thin, bespectacled young man in a black graduation gown who briefly posed with a school official and accepted his diploma.

This article originally appeared in The New York Times.