>> some time during the night, as debbie streeter slept, a thief sneaked into her garage and stole her007 kia sorento. >> hi, yes. i'd like some help. my car's gone. >> every time you walk outside you're looking around, seeing if someone's watching, you're checking doors and windows that you never did before. >> what happens to cars after crooks steal them? >> i just robbed him. i just robbed his house or whatever. >> we've been watching this fencing operation from behind the scenes. a place where thieves come to sell stolen goods to other criminals. >> hey, brother, what's going on? >> the guys behind the counters aren't crooks. they're undercover detectives. it happens at this little store tucked away in the shadow of the vegas strip. to look like a shop that sells and installs car audio systems. >> .357 shell there. >> where we first saw suspects selling guns and cars. >> .357. >> an alleges counterfeiter making bogus bills. >> what's up? >> where's the boys, man? >> business is still booming. this guy's here to sell grenade, looking for top dollar. $300 is the final sale. >> you kn