STAMFORD - Police are investigating a robbery at a Goodwill in Stamford this morning.Investigators say a man came into the rear entrance of the store on West Broad Street at around 7:30 a.m. and forced a worker to the store's safe while displaying a gun. The thief got $10,000 from the safe. Authorities believe it may have been an inside job because of the timing of the robbery.Anyone with information is asked to call Stamford police at 203-977-4444.To watch extended footage from the robbery scene, click on News 12 Extra on Optimum TV channel 612.