The gun store where Donald Trump’s would-be assassin is said to have bought ammunition hours before carrying out his fatal shooting has previously violated multiple federal firearms sales regulations, Newsweek can reveal.

According to a partially redacted US Justice Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) compliance inspection report obtained by NewsweekAllegheny Arms & Gun Works, a gun shop located in Bethel Park, Pennsylvania, where Thomas Matthew Crooks reportedly bought ammunition, was found to be in violation of three AFT regulations in a 2018 inspection.

Crooks, 20, was shot and killed by the Secret Service after firing a rifle from a rooftop while Trump, the 2024 presumptive Republican nominee, spoke at an outdoor campaign rally in Butler, Pennsylvania, on Saturday.

Trump was hit by a bullet that pierced his right ear, but was not seriously injured. However, the gunfire killed a bystander, Corey Comperatore, a 50-year-old volunteer fire chief, and left 57-year-old David Dutch and 74-year-old James Copenhaver seriously injured.

Hours before the dramatic events unfolded, Crooks purchased 50 rounds of ammunition at Allegheny Arms & Gun Works, according to a CNN report citing an unnamed senior law enforcement official.

The store’s owner has not confirmed or denied whether Crooks bought ammunition there, and it’s unclear whether Crooks used the ammunition he bought Saturday during the attack. But six years ago, the store was slapped on the wrist by compliance officers.

In a statement previously released to multiple media outlets, Allegheny Arms owner Bruce Piendl said, “As a responsible member of our community, it is our privilege to cooperate in any way we can with law enforcement. We are grateful that President Trump was not murdered and our hearts go out to all the victims of this horrific incident.

“Out of respect for the ongoing investigation and that of those affected, we will not be making any further statements.”

In a 2018 regulation violation, the store sold firearms to a redacted number of buyers who said they had been convicted of a misdemeanor or domestic violence when asked to disclose that information on a routine firearms transaction record form.

As part of the same breach, a number of people who had been patched did not respond when this information was requested. An additional corrected number of customers did not answer other questions listed on the form commonly used when buying and selling firearms.

“The licensee failed to stop the transactions and the firearms were transferred to the purchasers,” the report said.

However, he acknowledged that “criminal background inquiries of the purchasers involved did not reveal prohibitive information” that would have made the sales of the firearms inadmissible.

The report also found the store did not pose a “significant threat to public safety” and had conducted background checks on all unlicensed shoppers.

In his second violation, the store had, in some corrected cases, sold firearms without completing disposition entries in acquisition and disposition records, a sales inventory that gun stores are required to maintain.

In the third case, Allegheny Arms sold multiple guns to the same person in a short period of time without filing a required disclosure form.

The store was investigated between April 25 and May 9, 2018. As a result of the violations, the store received two warning letters.

From the report, Newsweek could not verify whether AFT reinvestigated Allegheny Arms and, if so, could not ascertain whether the store corrected those violations or collected further.

Newsweek AFT was contacted by email for comment on this story.

The AFT has investigated federal firearms licensees to ensure they are complying with federal laws and regulations since 1968, when the inspection program was established under the Gun Control Act.