Detroit Resident Pleads Guilty to Unregistered Possession of Destructive Devices

A 30-year-old Detroit man pleaded guilty today to charges of unregistered possession of destructive devices, Acting United States Attorney Daniel L. Lemisch announced today.

Lemisch was joined in the announcement by Special Agent in Charge David P. Gelios, Federal Bureau of Investigation, Detroit Division.

Sebastian Gregerson pleaded guilty before United States District Judge Arthur J. Tarnow in Detroit.

According to court records, on July 31, 2016, defendant Gregerson and an FBI employee acting in an undercover capacity met at a gas station in Monroe, Michigan, where Gregerson traded his Beretta M9 handgun for grenade parts containing explosives that were designed or intended for use in grenades and from which grenades could be readily assembled. These grenades are considered destructive devices that must be registered in the National Firearms Registration and Transfer Record. Gregerson did not register the destructive devices.

According to the court records, Gregerson made statements, both online and in person, showing support for the Islamic State of Iraq and Levant (ISIL), a designated foreign terrorist organization, and made statements relating to committing violent acts.

Gregerson was arrested on July 31, 2016, by FBI agents and remains in custody pending his sentencing which has been scheduled for June 30, 2017 at 2:30 pm.. Gregerson faces a term of up 10 years in federal prison.