EDITOR'S NOTE: An earlier version of this story erroneously reported the condition of Roger W. Adams at the time of the story, based upon incorrect information from a county official. This version has been updated.

EDWARDSVILLE • The truck driver who tried to burn down his house in Alton, then rammed a truck into his employer's depot in Edwardsvill before shooting himself Saturday was distraught over multiple problems, authorities said.

Roger W. Adams, 52, mentioned personal, financial and work-related issues to negotiators who talked to him during a 10-hour standoff with police, said Madison County state's attorney Tom Gibbons. He spoke at a press conference Saturday afternoon at the end of the standoff. He declined to elaborate.

Adams was taken Saturday afternoon in critical condition to St. Louis University Hospital, after he shot himself in the head.

The standoff was at the Schneider National trucking's facility in the Gateway Commerce Center in west Edwardsville. Adams was a driver for Schneider, a nationwide trucking firm based in Green Bay, Wis.

About 2 a.m. Saturday, Adams rammed a truck into the loading dock at Schneider. An employee called police at 2:08 a.m. to report the crash, just before Adams called police and said he was armed and would not be taken alive.

More than 50 emergency responders, including two tactical response teams, converged on the site, where a standoff ensued and did not end until about 11:50 a.m.

Edwardsville Police Chief James Bedell said it was then that police fired tear gas into the area where Adams was located, in an attempt to get him to surrender peacefully.

Bedell said Adams then told the negotiators he would kill himself and he shot himself in the head. At Adams' house in the 3000 block of Forest Drive in Alton, he had spray-painted the warnings "Do Not Enter" and "Booby Trapped" on the exterior.

Firefighters searched the house Saturday afternoon and found gasoline-soaked clothing strewn throughout. Alton Police Chief David Hayes said Adams apparently tried to burn the house but the fire went out for lack of oxygen.

A neighbor of Adams, Jane Zarantonello, said he was a quiet man and "kind of a loner" who had moved into the home about 20 years ago. She said he was a good neighbor and took good care of his house and yard. Zarantonello said Adams had been injured while driving for the company and had been off work for about four weeks.

Hayes said Adams had no criminal history with Alton police and seemingly was "not a bad guy."

Gibbons, the state's attorney, said the police massed at the scene had done nothing to provoke Adams into shooting himself.

"(Adams) was provided every opportunity to end this safely," Gibbons said.

He said a local negotiator and an FBI negotiator had been talking by telephone with Adams intermittently all morning.The 2 a.m. crash

resulted in a fire that drew firefighters from several departments but

they were kept away from the building by police out of concern for their

safety. The fire destroyed the truck cab but burned itself out before

causing much damage to the building. Authorities said Adams apparently set several fires in the company's offices but those were doused by sprinklers.

The Schneider firm issued a statement saying Adams had been in good standing with the company. "We have no insight into what may have motivated his actions today," the company said.

Hayes said Adams drove to the Schneider facility in a personal vehicle,then crashed a company truck into the building.

Gateway Commerce Center is a sprawling warehouse and light-industrial area in west Edwardsville, north of Interstate 270 and west of Interstate 255.

Shane Anthony of the Post-Dispatch staff contributed to this story.