on the moment that such crucial informations would really be known and this is really that something important. It is really just that this community is really that highly against KYC
and thats why they dont really that prefer it out but on cases or situations like this then it is really something important.
Generally speaking, KYC has many risk that is attached to it and the risks attached to it is not something I will begin to discuss now because it has already been talked about so many times on this forum. But there's a saying that's "everything that has disadvantages, also have a little or large advantage too. " Despite the risk of KYC, it has also help in capturing some culprits, just like the way the victims in the OP was identified.