. >> reporter: shawn marquez took out the skimmers and installed a nightvision spy camera instead. >> we have the first ever video of organized bad guys actually trying to retrieve their skimmers. >> reporter: credit card fraud problem in the u.s. alone. skimmers every day, every hour stealing your digits. >> they can use those 16 digits over the phone to place a phone order. they can use them online to plug it into a website. or they can actually clone a card. they can burn the information onto a blank atm or credit card and use that out in the wild. >> reporter: still not afraid? listen to this reformed credit card thief. >> it's very easy, and it's a lot of money. so anything i wanted i would just go out and get for free using these cards. >> reporter: dan defilippi is poacher turned gamekeeper. >> somebody turned my partner in and he turned me in. >> reporter: then defilippi started working for the secret service, teaching agents how to stop skimmers helping themselves to the data on our magnetic strips. >> when the magnetic stripe was created identity theft wasn't an issue, and s