KNOXVILLE, Tenn. - Police say a customer in a Knoxville mall fatally shot a clothing store employee because he was upset about a previous clothing purchase.

Knoxville Police spokesman Darrell DeBusk says 42-year-old suspect William Johnson went to Knoxville Center Mall Wednesday afternoon determined to get satisfaction from Reno Mens Wear.

Some mall merchants say the clothing store has a no-refund policy. Police wouldn't say exactly what Johnson wanted or what the disputed merchandise was.

But police say a preliminary investigation suggests Johnson became upset, pulled out a handgun and shot 29-year-old employee Ahmed Nahl.

The suspect was injured in a brief gun battle with police officers before his capture. He is charged with murder and is recovering in a hospital.