The FBI had been tracking a 29-year-old Detroit man for 16 months a he collected an unusual array of weapons.
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Gregerson is accused of unregistered possession of a destructive device and the unlicensed receipt of explosive materials, the complaint said.
The Detroit News said the document recounted a 16-month undercover investigation that began when an informant told the FBI that Gregerson was in possession of grenades and bazookas. He had stockpiled weapons, explosives, tactical gear and training materials at his house, including a loaded AK-47, a machete, a grenade launcher, hundreds of rounds of AK-47 ammunition, two balaclava ski masks that covered everything but the eyes, a Kalashnikov training video, and road spikes that he bought on eBay, court records show.
The case started 16 months ago with a tipster alerting the Federal Bureau of Investigation about Gregerson having bazookas and grenades, and ended with Gregerson buying grenades from an undercover Federal Bureau of Investigation agent at a Monroe gas station on Sunday.
The undercover agent, on multiple occasions, spoke with Gergerson about grenades, explosives, and he had even discussed his plans to carry out an attack on a building.
“They’re highly illegal, it’s a destructive device”, Gregerson told the undercover agent, according to court records.
Gregerson made an initial appearance Monday in U.S. District Court and is being held pending a Thursday detention hearing.
Other purchases included tactical training items, including handguns and dummy rounds.
An FBI surveillance team said it saw Gregerson buy a pistol in the parking lot of a gas station in Belleville. It is unclear from the affidavit whether Gregerson planned an attack, but at one point he told the agent: “I don’t play around”.
“The purchase of training versions of these weapons makes it unlikely that the weapons were purchased for recreational use, such as hunting”, the complaint states. As soon as the grenades were handed to Gregerson, he was arrested. Gregerson, who has a long brown beard and almost waist-length hair, quietly read a copy of the criminal complaint. If convicted, Gregerson could face up to 10 years in prison.
A Facebook page with the name of Abdurrahman Bin Mikaayl shows a picture of a man on a horse, holding a black ISIS flag.
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A message seeking comment from Gregerson’s attorney was left Tuesday.
