ATLANTA -- Atlanta police said a convenience store clerk was shot and killed Sunday morning by a man not demanding money, but an extra large T-shirt.

The fatal shooting happened at the Quick Stop Food Mart #2 on Cascade Road in southwest Atlanta.

Elliott Glass, an eyewitness, said he was mopping the floor inside the convenience store when a young man entered and told the clerk he wanted a white T-shirt size 5X.

“These guys wear those baggy pants, and big long T-shirts,” said Glass.

Glass said when the clerk turned to give the young man the shirt, the man started shooting, then calmly walked out of the store.

"He shot him like five times, four or five times, at point-blank range for no apparent reason," said Glass.

The store clerk is identified as Obi E. Onyemaechi, 48, of College Park, according to the Fulton County Medical Examiner’s Office.

"I was afraid he was going to shoot me, but I guess he must have run out of bullets because he was steadily clicking the gun as he walked out the door," said Glass.

Glass said he called 911, but claimed the operator put him on hold, so he ran out onto Cascade and flagged down the first police officer he saw.

“The guy was my friend you know. He was a good guy. He helped everybody around here. Senseless killing, he killed the man for no reason, you know,” said Glass.

Authorities said they are still searching for the gunman.