"I think it's amazing technology. For me as an investigator, I love it."

The box is a GPS tracking device.

We decided to put it to the test. We put it on our Action 2 News car and went for a drive.

When we got back, Schuch accessed the device's information and told us exactly where we went and how long we were there.

"There must have been some type of parking lot," he surmised from one of our trips.

Private investigators like the recordable tracking device because it shows them their subject's pattern and routine, making stakeouts and surveillance easier in the future. Investigators know exactly where to go.

"You can see each stop, drive time."

They can also give their clients a printout of the driver's activity.

"It basically does the job for me," Schuch said. "I can hand them a report, OK, they're at this address for this long, and all of a sudden they go, 'That's my best friend's house!'"

The device Schuch showed us records a person's movements for someone to look at later, but there are other GPS devices that transmit the information in real-time so at any given moment a person can see exactly where you are.

"With the live time, yes, you can follow them and catch them right in the act and see what's going on," Schuch. And that's what Calumet County's district attorney says happened to catch Dooley and Magolski in the act.