I'm confused why he even is interested in reaching these governmental organisations. Isn't it the idea of "code is the law" a pillar of the crypto movement?

I don't claim that the person in question did this but as a thought experiment IMHO stealing Bitcoin is oxymoron because the transactions are happening in the realm of zero trust computational environment. The whole premise is that this is a trust-less system which means that we shouldn't even attempt to trust in anything about the wallet movements.

Maybe it was a handshake deal that went sour afterwards?