FWIW, I am a retired cop, 31 years. As a patrol guy I recovered over a hundred “rolling stolen” cars; many vin switched. As a detective I busted two chop shops. As a detective lieutenant I oversaw many search warrants for stolen cars , parts & chop shops.
Once I tagged along with other detectives to a warrant where Edison thought the guy was stealing electricity; turns out he had a device/panel to bypass the meter inside his kitchen cabinets. The Edison boys removed the device crudely, wrecked his kitchen, and just cut the big power service cables feeding the property. The told me they would only turn the power back on once they certified it and they would “never certify it” as long as the same guy owned it.
While this was happening I noticed a nice looking Porsche Carrera in the driveway. I looked at the dash vin, located on the A pillar, and saw it was all scratched up. The secondary vin under the front was crudely brazed on. A third under the dash checked out, but the engine and trans numbers were ground off. A few calls to the NICB and I determined this car had been wrecked, front end destroyed. The current “owner” bought the hulk from a salvage yard. The guy had prior convictions for auto theft and receiving stolen Porsche parts. Apparently he had rebuilt the car with stolen parts, as he couldn’t explain where he got the front clip and turbo drive train. I seized the car and it was eventually sold at auction.