I think the Police worldwide are not really super advance to track the slander. Wallet address can simply be track once the owner is just like us a simple person. But it the owner is knowledgeable in crypto and know deeper than the Police. They cannot track and couldn't give justice to the victim. I hope one day there will have full protection not just for them but also for us who experienced hundreds of scams.
Not here in India. May be in some of the developed nations the police department has the resources to track down the blackmailers and recover the amount. But here, there are too many similar cases and the cops are either not interested in resolving them, or they don't have the manpower and equipment to do that. Also, in many cases the calls are being made from another country and that complicates everything. Unless some powerful individual is involved, the law enforcement authorities don't bother to link up with the officials in other country to gather the information.