PLAINS, Mont. - A quiet, unassuming family man, who was in fact a murder suspect on the run, was arrested at the Glacier Cross Roads trailer court in Plains Friday.

Neighbors and the property office manager knew David Gonzales, a man wanted for suspicion of a 1981 homicide in Houston, as Antonio Martinez and one neighbor expressed her disbelief.

"They were like the perfect family," said the neighbor, who declined to give her name. "The kids were some of the most polite kids I've ever seen. I was just shocked when we saw who it was. Total shock. I still think they must have the wrong guy."

Cross Roads employee Jackie Colyer was on duty in the management office when Gonzales was arrested Friday afternoon by the U.S. Marshals Service with an assist from the Sanders County Sheriff's Office.

"I saw a police vehicle come up into the main drive and two other police rigs I've never seen before and they took somebody away," Colyer said. "I didn't know it was Antonio. I can't believe it, though. He's got a wife and little kids here. They're precious."

Gonzales, 63, was wanted for a $100,000 homicide warrant from a fatal shooting at an east Houston bar in 1981. According to the U.S. Marshals Service press release, Gonzales allegedly shot another man outside a lounge in Harris County. The Houston Police Department identified Gonzales as the shooter. Investigators went to Gonzales' residence only to find it vacant.

Thirty years later, deputy U.S. Marshals in Houston provided Marshals in Missoula with a possible location in Plains. A positive match of photo IDs with a booking photo taken when Gonzales was arrested in Idaho in 1996 was the key to solving the cold case.

Gonzales was transported to Sanders County Jail, where he is awaiting extradition to Houston.