. >> reporter: private investigator mike russell and his partner have used the device for year to trackheating spouses. the newest technology punishments you live on a surveillance tape photo. rick is playing along. >> hey, rick, it's bruce lashay from channel 9. where the heck are you, buddy? >> almighty over here eating out. >> actually he's at a strip club in springfield. >> i have you at the gentleman's club. >> seems like i have explaining to do. >> what about the government? should police, federal agents be allowed to stick one of these on your car, and do it without a warrant? >> the d.c. court of appeals tossed out a conviction of antoine jones. authorities ruled the authorities needed a warrant to hide a gps on his car. >> they could be following a suspect's mother. >> reporter: mike russell says he will only use a gps transmitter if the client is on the car title, and he figures police ought to have some ground rules, too. >> they just put it on there as a matter of investigation? no. >> you think they need a warrant? >> yeah, need a warrant. >> reporter: police and federal ag