And now authorities say Chris Grant, 50, may have lied about his supposedly heroic deeds amid gunfire that left 22 people dead and about two dozen more wounded.
Crusius confessed while surrendering and told police he was targeting Mexicans, according to an El Paso police affidavit released days after the shooting.
"Mr. Grant's actions were captured on video, but they do not reflect his account to the media outlet [CNN]", Carrillo said. "We saw his actions ... and it's not like he described".
Grant and his family were invited to The White House so that he could be recognized for his alleged act of heroism.
Although Grant traveled to D.C., he didn't get his commendation from Trump, who handed it to Grant's mother instead.
The Secret Service confirmed to ABC that a man with an active arrest warrant was temporarily detained, but would not provide his name.
Weeks before the shooting, Crusius' mother contacted police to express concern over her son owning an assault rifle due to his age, maturity level and lack of experience, the family's attorneys, Chris Ayres and R. Jack Ayres, told ABC News in August.
Grant did not return a message seeking comment Thursday.
A USSS spokesperson confirmed to TIME that a visitor to The White House was arrested on Monday, but would not release the name per protocol.
In an interview with CNN's Chris Cuomo after the shooting, Grant said he was throwing bottles to distract the shooter, who then turned on him and fired. Lying in a hospital bed with tubes sprouting from his nose, Grant choked up describing the attack. "I see a whole bunch of kids like, without their parents running around screaming and crying, so I grab as many as possible", Oakley said at the time. "I just started throwing bottles at him".
'And I'm not a baseball player, so one went this way, one went that way.
Playing down his role, he said: 'I think a lot of men would have done that. "He just - boom, boom, boom, boom, boom - just started firing off rounds at me".
Crusius was placed on suicide watch at the El Paso County Detention Facility on August 19, ABC El Paso affiliate KVIA reported. In addition to being shot during the attack, Grant claimed to have thrown things, including bottles, at the attacker.
El Paso residents grieved at a memorial for 22 people who were killed in a mass shooting on Saturday.
"We welcome 11 extraordinary American heroes", Trump said to open the ceremony.
Carillo said that El Paso police would have shared their concerns about Grant's story, had they been consulted.
"Nobody bothered to check with us", Carillo told The Washington Examiner.
El Paso Police Department (EPPD) spokesperson Sgt. Enrique Carrillo tells TIME that Grant had a warrant for his arrest and was a "fugitive from justice", but the warrants were not issued by the EPPD and Carrillo could not provide the agency where the warrants originated.
Grant claimed that he helped his mother get to safety, then chose to slow the shooter down.