When Omar s Thorton came to the Hartford Distributors warehouse Tuesday morning, his lunch pail contained not one but two 9-millimeter handguns that he often used at a nearby shooting range. According to investigators, Mr. Thornton stashed the lunchbox in a kitchen next to the office where, in minutes, he would learn if he was to be fired from his job as a driver for the Manchester, Conn., company.

Once inside the office, the disciplinary hearing went about as smoothly as such things could, one person who was present said. The company, it turned out, had hired a private investigator, who had been following Mr. Thornton on his delivery route for weeks. They showed him videotape that apparently showed him stealing beer along his route.