DETROIT— Sebastian Gregerson, a Detroit gun fanatic and married father of twins who is charged in a case involving hand grenades and explosives, has cut a plea deal with the federal government.

Tuesday’s filing in the U.S. District Court revealed that Gregerson, 29, has a plea hearing before U.S. District Judge Arthur Tarnow on March 30. The specifics of his plea agreement were unknown at press time.

Gregerson has been imprisoned since July and is charged with obtaining explosives with the purpose of murdering and injuring people. Authorities said he purchased grenades from an undercover FBI agent at a Monroe gas station at that time.

Two years ago, an informant told the FBI that Gregerson had displayed support for ISIL, indicated that he wanted to move to an ISIS territory and said he possessed grenades, so the FBI kept an eye on him. The tip generated an investigation leading to an indictment.  However, it doesn’t identify whom Gregerson purportedly intended to attack. Nor does it mention terrorism.

However, after Gregerson asked a judge to allow him be released on bond and live with his family as he awaits the outcome of his trial, federal prosecutors revealed more information about his suspected ties to ISIL.

“The defendant is a supporter of the terrorist organization Islamic State of Iraq and the Levant (ISIL), and he acquired the explosives and other weapons to prepare to engage in violent acts aligned with ISIL,” court documents quote federal prosecutors as saying. These documents also state that Gregerson has been indicted in Virginia on charges that he bought two firearms in straw purchases.

On his Facebook account, Gregerson used the name “Abdurrahman Bin Mikaayl” and made comments that showed his support for ISIL.

Gregerson had tried to get the alias erased from his indictment. He claimed that he only used it randomly on Facebook and that he uses his real name for everything else. However, the federal government said that Gregerson has used “Abdurrahman” more than he claims and that it links him to ISIL.

Gregerson converted to Islam after graduating from high school more than a decade ago, according to courtroom testimony.