Relatives identified Corey Comperatore as the rally-goer who was killed Saturday in a assassination attempt about former President Trump in Butler, Pennsylvania.
Comperatore, 50, was a former fire chief for Buffalo Township, a volunteer fire service, local news station WPXI reported. He was shot and killed when Thomas Matthew Crooks opened fire on Trump from a sniper position about 150 yards away during the campaign event.
Two other people were seriously injured in the attack, authorities said, while Trump was grazed in the ear in the deadly attack.
The victim's sister, Dawn Comperatore Schafer, wrote in a Facebook post that Corey “was a hero who protected his daughters.”
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“His wife and daughters have just experienced the unthinkable and unimaginable,” wrote Dawn Comperatore Schafer.
“My little brother just turned 50 and he has a lot of life left to live. Hate knows no bounds and love knows no borders. Please pray for my sister-in-law, my nieces, my mother, my sister, for me and for his nieces and nephews, because this seems like a terrible nightmare, but we know that it is our painful reality.”
The post was accompanied by a photo of Corey celebrating his 50th birthday.
According to witnesses at the demonstration, one victim was shot in the head, and is now believed to be Comperatore. An emergency doctor who was present at the demonstration revealed how he performed CPR on a member of the crowd, according to reports.
Another family member, Allyson Comperatore, believed to be the victim's daughter, also took to Facebook to share her loss and paid an emotional tribute.
“Yesterday time stood still. And when it started again, my family and I began to live a nightmare,” Allyson wrote. “He was the best father a girl could ask for.”
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She posted several photos of him, including images of Comperatore fishing and with a birthday cake.
“The media won't tell you that he died like a real-life superhero. They won't tell you how quickly he threw my mother and me to the ground. They won't tell you that he shielded my body from the bullet that struck us.”
“He loved his family. He truly loved us enough to take a bullet for us.”
A GoFundMe campaign set up for his family has already raised nearly $80,000.
Matt Achilles, who lived near Comperatore for four years, described the Tribune-Review as a good neighbor and a dedicated public servant.
“He was a good person,” Achilles said Sunday morning. “We may not have agreed on the same political views, but that didn't stop him from being a good friend and neighbor.”
“He gave us money when I was in the hospital and he always came to visit us at garage sales. He always waved to me when I walked past his house.”
Crooks, 20, was from Bethel Park, which is a Pittsburgh suburb about an hour south of where the attempted murder took place.
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A search by Fox News Digital revealed that Crooks would have turned 21 this September. He had no criminal record, no traffic violations, no bankruptcies, no liens or foreclosures.
The FBI is investigating the shooting as attempted murder.
Fox News Digital's Scott McDonald contributed to this update.