. >> and i'm jason uller. they are after your cash. we explain how it works. >> this scam all starts with a phone call but the scary part is that after that call, a short time later the criminal shows up at your front door. take a good look at this surveillance video showing a woman walking out of a pinellas grocery store. account. >> they tell the victim there is a problem with the debit card and they will respond and take the debit card and pin number and have a new chip card sent to prevent fraud. >> hillsborough county has one case pinellas county got three more. >> the sergeant says the victims are 75 years old and up targeted. >> somebody is getting in a neighborhood phone book. >> tonight he worries about their safety. >> violence can very easily occur. if they are trying to get money. how far do they take it. >> detectives believe there are a lot more victims across the bay area. they want everyone to know that banks do not send employees to your home in pinellas county. abc action news. intercepting conversations about a poten