(Boring, OR)  --  The reward is now 25-thousand dollars for information leading to the arrest of 42-year-old murder suspect Dirck White.  Police say White is considered the main suspect in the shooting death of 47-year-old Grady Waxenfelter, a Clackamas County weighmaster.  Authorities say Waxenfelter was killed last February in Boring after he stopped White's truck because it didn't have a license plate on the trailer.  White is described as Hispanic, five-feet-eight, 190 pounds, last known to be driving a 2004 Mercedes 320 four-door sedan with Washington plate ANB7070.