deputies say the man being inveetigated in her disappearance killed himself and his two children in an eeplosionon sunday. investigators say josh powell set off the expllsion after his two sons arrived for a supervised visit.powell was the focus of an investigation into the disappearance of his wife... susan cox-powell ...who went missing in 2009 in ((1:05 first he wife, the mother of those two boys; uh, and then -- and then, uh, then him and his two sons. you know, it's one thing to havv him get charged or not charged and deal with t, but -- but 1:18))the explosion happened just days aater powell was denied custody of his boys by a washington judge... who ruled they should remain with their grandparents.deputies say it appears powell alss sent an e-mail shortly before the fire... saying quote "i'm sorry, good-bye." police are investigating an early morning obbery and police chase ... in caaroll patrol... when he encountered a suspicious vehicle.. on route 140 in finksburg.when he attempted to pull the truck over... it took off.minutes later... the driver lost control... overturning on esther an