AURORA, Colo. -- For months, police had been called to the peaceful neighborhood of this Denver suburb to mediate a bitter dispute over parking in the 30-foot alleyway that separates two homes.
Since October, officers arrived nearly a dozen times, sometimes more than once in a day. On Saturday, police again were called to the two townhouses and ordered the son of one family to move his vehicle.
The next day, police said, the dispute took a deadly turn. Authorities say Elsworth Walker sat in a lawn chair in his garage for nearly seven hours, a gun hidden in a camera bag near his feet.
He was waiting for neighbor Charles ''Bud'' Crihfield to leave his home. When Crihfield finally backed his Ford Expedition out of his garage, with his teen-age daughter at his side, Walker approached.
The 64-year-old retiree said the two men needed to talk about their parking problems. Crihfield refused. Police said Walker then pulled the gun from the bag and fired, killing Crihfield and Cristina, 14.
Neighborhood residents were shocked. ''I didn't think it could happen here, but I guess anything like that will happen anywhere now, small towns and here,'' said Carl Studer, 65.
In 1996, Walker retired after 30 years with the Regional Transportation District, where he had been a supervisor responsible for at least 300 bus drivers, said Scott Reed, a district spokesman who worked with Walker for five years.
''He was very straightforward and you knew where you stood,'' Reed said Tuesday. ''Everybody I talked to seemed shocked and this just seemed out of character.''
Crihfield, 41, had taught computer technology, economics and business management at George Washington High School for about a year. Cristina was an eighth-grader at Aurora Hills Middle School, where she was in the chorus.
When officers arrived after Sunday's shootings, Walker was waiting on his porch steps. ''I'm the one you're looking for,'' Walker told them. ''I shot the male driver and the girl started screaming and I popped her.''
Walker was being held without bail Tuesday.
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