In all previous letters written on this subject, in my opinion, they are talking about after the catalytic converter has been stolen.
The problem could come to a snail’s pace if the police could go after the people that are buying the stolen “cats.” If this could be done it would not stop the stealing of the units completely, unfortunately. Thieves steal items because there are buyers for stolen product. In some cases mostly legitimate repair shops buy the stolen “cats” because they are at a very cheap price. I have heard stories where the repair shop is installing the “cat” that came from the car they are repairing.
All of this is a cycle of events that should be stopped by arresting or fining the shops that buy the stolen items. But our laws only allow the police to act after a crime is committed.
Just a thought.