The two teenagers accused of beating World War II veteran Delbert “Shorty” Belton to death in Spokane, Wash., last month pleaded not guilty today. KREM-TV reports that Demetrius Glenn and Kenan Adams-Kinard, both 16, face charges of first degree robbery and first degree murder.

Investigators believe the teens were trying to rob Belton, although at one point Adams-Kinard claimed that he and Glenn were trying to buy crack from Belton, and Adams-Kinard “took his wallet and another ounce of crack from his pockets” after they knocked the 88-year-old unconscious.

The new charges take precedence over existing charges against the two teens. According to KREM, Adams-Kinard pleaded guilty to stealing a cell phone from a woman in May, and Glenn pleaded guilty in January to an assault and riot charge after allegedly attacking a teenage boy with a stick with a nail attached.