The armed robbery of a convenience store could land a Topeka man in prison for up to 20 years.

Maroleno Devon Ryland, 34, Topeka, Kan., pleaded guilty Monday to one count of commercial robbery, U.S. Attorney Tom Beall said.

On Feb. 2, 2017, an employee of Casey’s General Store at 600 S.E. Rice Road in Topeka reported a man with a gun threatened to kill him unless he turned over store deposits he was taking to the bank. Soon after the robbery, a Topeka police officer saw Ryland and co-defendant Christopher Allen Bush, 26, Topeka, Kan., sitting in a vehicle together. Later, police stopped another car in which Ryland was a passenger. They arrested Ryland and seized cash from the robbery.

Co-defendant Bush is set for a change of plea hearing June 26.

Ryland’s sentencing is set for Sept. 18. He faces up to 20 years in federal prison and a fine up to $250,000.