What we know about the suspect in the shooting at Trump rally: FBI names a 20-year-old man from Pennsylvania

A 20-year-old Pennsylvania man is suspected of being the gunman who attempted to assassinate former President Donald Trump on Saturday, firing multiple shots and killing at least one bystander, federal and local law enforcement authorities said.

The FBI identified the suspect killed at the scene early Sunday as Thomas Matthew Crooks of Bethel Park.

Shortly after Trump entered an outdoor stage in Butler, Pennsylvania, around 6 p.m. on Saturday, shots were fired, said Lt. Col. George Bivens of the state police. The suspect fired from the roof of a building outside the security perimeter and aimed from several hundred yards away from the stage, law enforcement authorities said.

One of the bullets hit Trump’s right ear, the former president said. The US secret service said Trump was “safe”.

A Secret Service sniper opened fire and killed the suspect, the agency said. The scene was “chaotic” and “everything unfolded very quickly,” Bevins said.

It took law enforcement officials several hours to publicly identify Crooks as their suspect. At a news conference late Saturday, they said they believed they knew who carried out the shooting but would not name the person.

Officials said during the press conference that they would use the suspect’s DNA to confirm his identity because he was not carrying anything that could have identified him.

“It’s about biometric confirmations,” said Kevin Rojek, the FBI special agent in charge. “For example, there were no identifications from the person, so we’re currently looking at photos and trying to analyze his DNA and get biometric confirmation.”

It is too early in the investigation to say whether Crooks acted alone, Bivens said. Investigators are looking into whether anyone else was involved, he said.

The FBI has “no identified motive at this time, although our investigators are working tirelessly to determine the motive,” Rojek said.

According to Pennsylvania state records, Crooks was registered as a Republican voter.

When the FBI issued a statement early Sunday identifying Crooks by name, an FBI spokesperson said the investigation was “active and ongoing.” The FBI urged anyone with photos, videos or information to come forward.

ABC News’ Jack Date, Luke Barr, Isabella Murray, Mark Osborne and Charlotte Slovin contributed to this report.