A new search warrant has been released for Seth Kenney, the “armorer mentor” hired on the set of Rust to supervise rookie armorer Hannah Gutierrez-Reed. Authorities believe that he could be the person who provided ammo for the film.

It is the largest lead in the Rust investigation, outside of pending lawsuits, since discovering Seth Kenney’s role on set in early November. An Arizona gun expert and owner of a licensed weapons and prop house, Seth Kenney may be the key to discovering not only just how live ammunition got onto the set of Rust, but also who was responsible for the death of Halyna Hutchins, the cinematographer who was accidentally shot by actor Alec Baldwin.

According to local KOAT 7 News, authorities are searching his business in Albuquerque, New Mexico, PDQ Arm and Prop. Investigators are following leads after finding additional live ammo on set, which Hannah Gutierrez-Reed previously said that she had “no idea” how it got there.

The search warrant detailed that Seth Kenney told officers the live ammunition might have been “handmade reloaded rounds” that he received from a friend, KOAT 7 News reported.

“From a law enforcement perspective, they’re getting closer, literally to the smoking gun,” said KOAT 7 News legal analyst John Day. “It’s probably not the last we’ve seen of search warrants and more information coming in.”

Hired in late September, Kenney was added to mentor and supervise Gutierrez-Reed, whom he had originally suggested for the job despite having very little experience as an armorer. His company allegedly provided the guns for the film, where live ammunition might have been accidentally introduced.

Earlier in November, Hannah Gutierrez-Reed’s father Thell Reed, who is a well-known Hollywood armorer, also contacted deputies with information about the Rust shooting. He told authorities that he worked on a film with Seth Kenney back in August and September, where there was fire arm training for the actors on set.

Conducted at a firing range, Kenney asked Thell Reed to bring along some additional ammo, claiming that he brought 200-300 rounds in an “ammo can,” but that they were “not factory-made rounds.”

Kenney allegedly accidentally took the can home with him to New Mexico and told Reed to just “write it off” after several attempts to retrieve it. Reed told investigators that it was entirely possible that the can could have included a .45 caliber colt ammunition inside, which matched the bullet used in the fatal Rust shooting.

A .45 caliber colt handgun, the kind used on the set of 'Rust' supplied by Seth Kenney
A .45 caliber colt handgun, the kind used on the set of ‘Rust’ supplied by Seth Kenney. Photo Credit: Shutterstock

“Mr. Kenney is fully-cooperating with the authorities, as he has been since the tragic incident took place,” said Seth Kenney’s attorney, Adam Engelskirchen.

In a statement to ABC News, Engelskirchen stated that “neither Mr. Kenney nor PDQ Arm & Prop, LLC provided live ammunition to the Rust production.”

He went on to claim that “Reports in other media outlets that Mr. Kenney was part of the crew of Rust or was employed by the production to provide any sort of supervisory services are patently false,” and that the search warrant “includes material misstatements of fact.”

Confirming that the live ammunition came from Seth Kenney would be a big breakthrough in the Rust investigation, but it still may not prove exactly who is responsible. In many lawsuits filed so far, various crew members have been held liable, such as armorer Hannah Gutierrez-Reed, assistant director David Halls, actor Alec Baldwin, and the Rust Productions film company.

Hannah Gutierrez-Reed’s attorney, Jason Bowles, said that the search warrant was a “huge step forward” to “unearth the full truth of who put the live rounds on the Rust set.”

“The questions of who introduced the live rounds onto the set and why are the central questions in the case,” he told ABC News.

No charges had been made as of Wednesday, and Seth Kenney has not been arrested for any crimes connected to the Rust investigation.