King County prosecutors have charged a man for fatally shooting his stepdad at a First Hill gas station earlier this year.

PI.com:

Court documents say police were investigating a tip that that the stepson, Zachary E. Collins, shot Parker because he thought Parker had been molesting the stepson's mentally disabled brother. The molestation allegation hasn't been proven.

Collins, who prosecutors say travels between Seattle Portland, remained at large when charges were filed. If convicted, he faces a minimum of 15 years in prison for the crime, according to court documents.

Police found Glennis Parker in a 76 gas station parking lot, sitting in the driver's seat of his GMC truck. He'd been shot three times in the head and was unarmed.

Investigators initially said little about the Feb. 9 killing -- the third homicide in Seattle this year. But court documents show that in the days after the homicide, police wanted to talk to Collins, who had argued with Parker about an hour before he was found dead.