(Portland, OR)  --  A reward of up to 25-hundred dollars is being offered for information leading to an arrest in an unsolved hit-and-run that killed a 65-year-old man.  Police say 65-year-old Stanley Grochowski was crossing North Greeley Avenue on the night of August 30th when he was hit by a vehicle, which stopped for a moment and drove off.  Grochowski was seriously injured and died on September 9th.  Police believe the driver was in a dark-colored, 2008 to 2012 Toyota Rav4 SUV with silver trim.  Anyone with helpful information is asked to call Crime Stoppers.