Just the fact that he was in tokyo (japan), instead of a non US aligned country, such as Russia or China, that he had his private keys easy accesible and that he stayed in BTC instead of going for another crypto more anon friendly, says a lot of the stupid nature of this "criminal"
But once again, my whole point is, coinbase allowed a random person to deposit 154 millions USD and withdraw 3.8k btc with absolutely no problems? and in a quickly way, according to the original article
I think its safe to assume that the banks said, okay the money went to coinbase, and coinbase just said yeah about that, he used the money to buy BTC and withdrew it to this wallet and thats about it
the guy was located cause he didnt even try to hide himself, the rest is history.
my point remains, if this, that was a such dumb crime, managed to convert the stolen funds into BTC using coinbase with absolutely no problems, then its easy to assume that real and strong money going to biggest offshores exchanges is from illicit sources.