In every country that I have been to, crime has been predominately handled by the public sector. However, they haven't done a particularly good job and it has remained a pressing problem. The private sector is unlikely to be able to do a good job as there are too many social elements that the private sector do not have adequate incentive to address.
I mention at the end of the post that I believe a blockchain solution might be possible. I think it is an approach worth exploring.
Definitely I did see that, and I was busy rummaging my mind on how blockchain can be really incorporated seeing it's unpopularity, into handling some of these dicey issues. I guess in the future this can be handled.
I doubt a blockchain solution is going to be possible in the near future but the possibilities for the blockchain are insane. I am guessing in 10 years we will be seeing things using blockchain technology that we can't even imagine today.