SAN ANTONIO -- Police are searching for a suspect who hit up four Valero convenience stores within one hour Saturday night. The spree started at 10:15 at Old Hwy 90 and 36th Street and officials say the suspect did the same thing during each robbery. He would walk in the store, place a handgun on the counter and demand money from the cash register. Then he would run to a nearby vehicle and flee the scene. The robber hit the Valero stores at 3900 block of Callaghan, 2100 block of 36th Street and the 9000 block of Marbach. Police could not say how much money was taken but they do have video of him at several locations.