OMAHA, Neb. (AP) — The former chairman of the Omaha Tribe of Nebraska has pleaded guilty to an accessory charge in the theft of money from the tribe.

54-year-old Amen Sheridan, of Walthill, entered his plea on Monday in U.S. District Court in Omaha. He faces up to 30 months in prison when he’s sentenced on Sept. 14.

Court documents say Sheridan knew that Julia Whiteskunk had illegally used tribal funds for a down payment on the house they bought in 2009 and had helped her to prevent her arrest.

Whiteskunk was executive director of the tribal housing authority. She was charged in the scheme, but she died in September.