If police really want to solve the issue. Just have some corollas parked at several location as bait cars. Like choohay pakarnay wali " krukki". Follow the track where they go and catch them. Its that simple. These devices cant deter the crime altogether. And manufacturers to come up with VIN system along with dept of motor vehicle. Also better deterrence system in the cars.
At least someone will be caught. BUT all issue is in policibg.these police wala are involved. They get their share.