What we know about the Trump attempted assassination investigation

(BUTLER, P.A.) — As the investigation into the assassination attempt on former President Donald Trump intensified Sunday, the U.S. Secret Service was coming under scrutiny as questions mounted on how the alleged gunman managed to fire a barrage of shots from the rooftop with a vantage point of the outdoor Pennsylvania rally stage Trump was speaking from.

The FBI identified the suspected gunman as 20-year-old Thomas Matthew Crooks of Bethel, Pennsylvania, whom officials said was armed with an AR-15-style rifle and fired up to eight shots before a Secret Service sharpshooter shot and killed him, law enforcement officials told ABC News.

The suspect appeared to be wearing a T-shirt and tan camouflage shorts that blended into the colors of the building he was perched atop.

Watch the ABC News special, “Trump Assassination Attempt Minute by Minute,” Sunday at 8 p.m. ET

The firearm recovered at the scene of the assassination attempt was legally purchased by the suspect’s father, an urgent trace conducted by the federal Bureau of Alcohol, Tabacco, Firearms and Explosives (ATF) found, according to multiple law enforcement sources.

Federal investigators said they have found no links between the suspect and any international terrorist group. Investigators said they’re still looking into whether the suspect had any ties to domestic terrorist groups.

The suspect had no U.S. military affiliation, according to the Pentagon.

Investigators are also combing through the suspect’s social media footprint for clues, officials said.

Investigators are looking at what sources describe as misinformation the suspected gunman appeared to have been recently consuming and whether it played any role in the incident, according to law enforcement sources. So far, investigators have not uncovered any ties to extremist organizations or individuals, though they continue to scour information from the suspect’s phone and other digital devices, the sources said.

Trump posted on his Truth Social site that he suffered a bullet wound to his right ear in the attack.

Trump was less than 10 minutes into his campaign speech and had turned his head to look at a jumbotron when the gunfire began, according to witnesses and video of the moment. Video captured the former president reaching for his ear and going to the ground as multiple shots could be heard.

A man who was attending the rally was fatally shot and two other rallygoers were shot and wounded, federal officials said. Pennsylvania Gov. Josh Shapiro identified the deceased victim as Corey Comperatore. The other names were not immediately released.

Authorities found items of concern inside the shooter’s vehicle parked outside the Trump rally, law enforcement sources told ABC News.

Bomb technicians and other experts were called to investigate but there is no immediate word on what the suspicious items were or whether they were potentially harmful. Officials are awaiting information as to what the items were and whether they contained explosives.

The FBI is leading the investigation. Overnight, investigators said they executed a warrant at Crooks’ home.

The roof where the suspect fired from had been surveyed during security preparations for the event, a law enforcement source told ABC News.

The roof was empty during those security preparations, the source said.

It remains under investigation why the Secret Service or local law enforcement didn’t post someone at the building to prevent anyone from accessing the roof.

Secret Service denies report it rebuffed Trump team request for beefed-up security

The former president, who was wearing a Make America Great Again hat, was seen in a video clutching his right ear and going to the ground as several Secret Service agents rushed to cover him with their bodies and people in the crowd also ducked for cover.

Anthony Guglielmi, a spokesperson for the Secret Service, posted a statement on X on Sunday disputing media reports that the Secret Service rejected a request from Trump’s campaign team to supply additional security resources.

“There’s an untrue assertion that a member of the former President’s team requested additional security resources & that those were rebuffed. This is absolutely false. In fact, we added protective resources & technology & capabilities as part of the increased campaign travel tempo,” Guglielmi wrote.

Some senators call for investigation of Secret Service

“I call on you to launch a full, public and comprehensive committee investigation into this assassination attempt and failures to adequately protect the president,” Sen. Josh Hawley, R-Mo., said in a letter released Sunday formalizing a call for the Senate Homeland Security Committee to investigate the attack on Trump.

The House Homeland Security Committee also asked the Secret Service director, Kimberly Cheatle, to testify soon.

ABC News’ Josh Margolin, Pierre Thomas, Luke Barr and Aaron Katersky contributed to this report.