Haig told Newsweek that he "used to sell ammunition reloading components" but had not sold any "for a long time", and suggested that perhaps Paddock had one of his old business cards.
"I never heard of the guy", said Paddock, who lives in Orlando, Florida.
Haig told Newsweek he was questioned by agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives after the October 1 shooting.
Paddock opened fire on the Route 91 Harvest music festival from the 32nd floor of the Mandalay Bay Resort and Casino on October 1, killing 58 people and injuring more than 800 others.
Clark County District Court Judge Elissa Cadish said Tuesday that her staff failed to black out the name in almost 300 pages of documents released to news organizations including The Associated Press and Las Vegas Review-Journal.
It has been revealed Haig said he met the crazed gunman once and sold him ammunition.More news: San Jose will host 2019 NHL All-Star Game, other worldwide games announced
"He showed up. He told me exactly what he wanted".
"I have to think that if it was really, really serious or there was something that they thought I did that was wrong, [the agents] would have been kicking my door down", Haig said.
About 22,000 people were attending the music festival when Paddock began shooting indiscriminately at them from his hotel room at the Mandalay Bay Resort and Casino.
It is unclear whether Mr. Haig, who was identified in the documents as a person of interest, remains under investigation. Jerry MacDonald said that SWAT officers witnessed shooter Stephen Paddock's suicide inside of his Mandalay Bay hotel room.
Las Vegas police officials told CNN on Tuesday the department can not comment on Haig or any names. Specialized Military Ammunition's website says it is "closed indefinitely".
Cadish later ordered the full document not be published without redactions, but she acknowledged she couldn't order the newspaper to retract the name.More news: Officer Who Pushed False Hawaii Missile Alert Believed It Was Real
An additional person of interest was identified in the days after gunman Stephen Paddock carried out the Oct.1 massacre on the Las Vegas Strip, newly released court records show.
She was initially considered a person of interest but authorities later said she is not likely to face criminal charges.
The other is Paddock's girlfriend, Marilou Danley. CBS News reached out to the FBI and other authorities involved, but none will comment on an active investigation.
The coroner has already named bullet wounds as the cause of death for all 58 victims, but the detailed records could shed light on the medical response time to those killed in the shooting. The coroner and county attorneys didn't immediately say whether they would appeal Williams' ruling to the Nevada Supreme Court.
One was deceased shooter Stephen Paddock's girlfriend, Marilou Danley, who has since been publicly cleared in the case.More news: Green begins press conference with compassionate statement on Michigan State
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