(Boring, OR)  --  A manhunt continues for 41-year-old Dirck White, a truck driver who's wanted in the murder of a Clackamas County employee near Boring.  White, a resident of Edgewood, Washington, is accused of fatally shooting Clackamas County weighmaster Grady Waxenfelter on Highway 224 near Amsigger Road last Thursday.  Authorities say White has an extensive criminal record.  White, who's described as a Hispanic man with an average build, is believed to be in a four-door, 2004 Mercedes 320 with Washington license plate ANB7070.