It was a shocking news for the world, as in a chaotic and shocking incident, former U.S. President Donald Trump was hit in the ear in an apparent assassination attempt by a gunman at a campaign rally on July 13.

The FBI identified the shooter as Thomas Matthew Crooks, a 20-year-old from Pennsylvania’s Bethel Park, and the investigation is underway. He appears to have acted alone, according to the FBI, which is investigating it as a potential “domestic terrorism” act.

In a prime-time national address from the Oval Office, President Joe Biden warned of the the risks of political violence in the U.S. after Saturday’s attempted assassination of former President Donald Trump, saying, “It’s time to cool it down.

The 78-year-old former president was rushed off stage with blood smeared across his face after the shooting in Butler, Pennsylvania, while the gunman and a bystander were killed and two spectators critically injured.

The gunman who shot at former president Donald Trump during an election rally in Pennsylvania on Saturday appears to have acted alone, according to the FBI, which is investigating it as a potential “domestic terrorism” act.

“At this point in the investigation, it appears that he was a lone actor, but we still have more investigation to go,” said Robert Wells, the executive assistant director of the FBI’s National Security Branch.

The former fire chief who was killed at a Pennsylvania rally for Donald Trump spent his final moments diving down in front of his family, protecting them from the gunfire that rang out Saturday during an assassination attempt against the former president.

Corey Comperatore’s quick decision to use his body as a shield against the bullets flying toward his wife and daughter rang true to the close friends and neighbors who loved and respected the proud 50-year-old Trump supporter, noting that the Butler County resident was a “man of conviction.”