SURVEILLANCE VIDEO (unedited): Watch as Hero Thwarts L.A. Tan Robbery and Kills Gunman

Gary Amaya went into L.A. Tan in Orland Park Saturday night with a .38-caliber pistol in his pocket. Less than 10 minutes later, the rotund gunman was on the floor, beaten and shot.

Jason McDaniel told reporters that he decided on a whim to stop by the L.A. Tan, at 15633 S. 94th Ave., about 6:30 p.m. Amaya, 48, had already tied up the clerk. He ordered McDaniel, 29, to tie himself as well. Amaya then put the pistol down on a counter and bent over to pick up an item he dropped. McDaniel rushed Amaya with a good 10 feet between the two men and they struggled.

Within a minute, McDaniel grabbed the gun, struck Amaya in the head with it and fired. The clerk called 911 and tried to untie herself. Amaya was shot in his side, and died an hour later. Most of the struggle takes place off camera.

Police continue to investigate possible ties between Amaya and the "honeybee" killer, who went on a shooting spree in October.