Northfield Township Police are asking for tips to find a robber who used a “scream” movie mask to rob a gas station on North Territorial Road. Police say the suspect walked into the Shell gas station Wednesday morning disguised with the mask and a hoody, and holding a sliver handgun. He was able to get some money and took off on foot to a nearby vehicle. Anyone with information in the case is asked to call the Northfield Township Police Department or Crime Stoppers at 1-800-SPEAKUP.