Zero Chance.But.. if he did not purchase the crypto but instead mined the crypto hidden behind some Tor, VPN or other stuff to hide the real IP, and never connected the wallet to his real identifying data, and also contacted the hitman/scammer through a real secure connection, would they be able to find him?
If you know genuinely, How blockchain works.
In this thread "The Man" got caught, buy bitcoin from Exchange. There is not deep complex analysis You have to do for this case. This is just for News Headlines and for police ego satisfaction that How Smart they are? You can easily track Him by just looking into the blockchain.
Most people who got caught are using a Verified Exchange wallet.
The best example is this
I know so many people claiming that They are crypto expert and even does not know "Paper Wallet".