The Allegheny County medical examiner announced yesterday that shots fired by police during an exchange of gunfire in Mount Oliver Tuesday did not kill a police dog.

Dr. Karl Williams said the bullet that killed K-9 Aulf was fired from a weapon found at the scene of the shoot-out, which police said was carried by suspect Justin Jackson.

Mr. Jackson was confronted by Pittsburgh police late Tuesday afternoon because they suspected he had a gun. When ordered to show his hands, police said, he was holding a gun. One officer released his K-9 to subdue Mr. Jackson. Police say Mr. Jackson began firing.

Some witnesses speculated that police firing at Mr. Jackson might have hit the dog. Dr. Williams ruled that out.

He said there is evidence that the weapon found at the scene was fired "at least once, from the inside out, through the pocket of the outer garment that was worn by Mr. Jackson at the time of the shooting. The projectile that resulted in the death of the canine was fired from the weapon found at the scene. It was not fired from the weapon of either of the two police officers involved in the incident."