Oregon-based Tannerite company investigator works with FBI on NYC explosion

New York Mayor Bill de Blasio, second right, and New York Gov. Andrew Cuomo, third right, stand in front of a mangled construction toolbox Sunday, Sept. 18, 2016, while touring the site of an explosion that occurred on Saturday night in the Chelsea neighborhood of New York. Mayor de Blasio ruled out any terror connections, but called the blast an "intentional act." (Justin Lane/EPA via AP, Pool)

NEW YORK – Law enforcement officials say they found remnants of the explosive compound Tannerite at the scene of the bombings in New York over the weekend.

But an investigator for the Pleasant Hill, Oregon-based Tannerite company says that might not be the case.

Tannerite is a copyrighted formula for rifle practice and an investigator for the company says it only explodes from the impact of a center fire rifle.

He said that makes it an improbable, or at least impractical, substance for the New York bombing.

In past investigations, he’s found there are usually two possibilities.

“It either: A, wasn't Tannerite; or B, if it was, somebody was using it as it was unintended and they added something to it or they changed its property somehow, but they were still shooting it," said Steve Yerger, a Tannerite corporate investigator.

Yerger said it may be that investigators are using the word “Tannerite” for an explosive substance like some people say “Kleenex” for a tissue.

He said it could have easily been something else resembling Tannerite. He’s working with the FBI to get to the bottom of this.

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