Police responded to a shooting on December 19, 2012, in the 400 block of Hillcrest Drive where a teenage boy was shot in the chest.
Frederick City Police charged 17-year old Cory Norwalk in connection with that shooting.
Police have also charged him with another shooting, that occurred on December 17, 2012. They say it happened at the Toy-R-Us along Route 40.
Police say Norwalk fired the gun in the air and admitted the same gun was used in both shootings.
He was recently charged as an adult, and was served with an arrest warrant for his involvement.