A jury has convicted a man of murder in the shooting of a store clerk at a Knoxville, Tenn. mall during a dispute over tailoring.

The jury found 44-year-old William Johnson guilty Wednesday after just an hour of deliberation. He was charged in the October 2008 shooting death of 29-year-old Reno Mens Wear clerk Ahmed Nahl.

Authorities said Johnson went to the mall, upset at a tailoring job and demanded a refund.

According to WATE-TV, Johnson testified that he only meant to intimidate Nahl with his gun.

Johnson said he exploded and shot Nahl because the clerk said he could order new suits, but Johnson would have to pay for them, plus shipping.