LINCOLN, Neb. (AP) — The Lancaster County sheriff says an internal investigation shows a deputy followed department protocol in shooting an armed 18-year-old, ending a chase across a street from the Nebraska Capitol.

Sheriff Terry Wagner said Monday that Deputy Jeffrey Moeller acted within the scope of the policy on use of force. Wagner says Moeller and a deputy U.S. marshal shot Tareik Artis after Artis pointed a loaded .45-caliber handgun at them. Artis was fleeing from a Lincoln officer after a traffic stop. Lincoln police say the officer saw that Artis was carrying the gun, so the officer called for more aid.

The U.S. Marshals Service hasn’t named the deputy marshal involved. The agency and Lincoln police also are investigating the shooting.