At the time, Trump wasnt president. Biden was, so FBI and other authorities were under his control.
Information re the incident is scant to say the least
Thomas Matthew Crooks (September 20, 2003 – July 13, 2024), a 20-year-old from Bethel Park, Pennsylvania, was the shooter.
Key Details:
On July 13, 2024, at a Donald Trump campaign rally in Butler, Pennsylvania, Crooks climbed onto the roof of a nearby building (American Glass Research/AGR building, about 130–150 yards from the stage).
He fired eight rounds from an AR-15-style rifle (purchased legally by his father), grazing Trump’s right ear, killing one attendee (Corey Comperatore), and critically injuring two others.
He was shot and killed by a U.S. Secret Service counter-sniper team shortly after opening fire (within about 26 seconds of the first shot).
The FBI identified him the next day and concluded he acted alone. His motive remains unclear despite extensive investigation.
This is confirmed by official FBI statements, congressional reports, and widespread news coverage.