Published: Jun 19, 2014 10:33 PM EDT
Updated: Jun 19, 2014 10:43 PM EDT

COLLIER COUNTY, Fla.- Look closely at these photos. Marco Island Police said this couple rigged a credit cark skimmer to a gas pump on Marco Island in late March. You've heard of the devices, they steal your credit or debit card information when you swipe. But identity theft expert Carrie Kerskie said when detectives get their hands on the skimmer, like the one on Marco, it helps solve their case.

"They're either going to try to track down who the victims are based on the information they receive off those skimmers, or they might try to contact the financial institutions or credit card companies themselves."

Kerskie said it's rare to catch the crooks but when they are arrested it's usually thanks to an unrelated incident.

"A lot of times if they do get caught it's because its a minor traffic stop and they find the tools in the back of the car."

With this couple, Kerskie believes, they may be part of a larger skimming ring.

"But to actually find them while they're using that tells me law enforcement or the credit card companies had the information ahead of time and they were able to coordinate that with the store to obtain those surveillance videos."