LINCOLN, Neb. (AP) — An Omaha man has filed a complaint in U.S. District Court that challenges the constitutionality of a Nebraska law that prohibits some criminals from possessing deadly weapons.

54-year-old Wa’il Muhannad filed the complaint last week. He had a halal meatpacking business in Dodge County until he discovered he couldn’t legally have a knife with a blade longer than 3.5 inches because he’s a felon.

Current state law prevents convicted felons, anyone with an arrest warrant, anyone who has violated a protection order or anyone who has been convicted of a domestic violence misdemeanor within the past seven years from carrying deadly weapons.

Muhannad’s attorney, Travis Penn, asked a federal judge to stop Nebraska from enforcing the statue and to order state Attorney General Doug Peterson to ensure the statute’s effects are eliminated.