Only explanation I can think of is dude planned to leave the country shortly and figured he'd be gone by the time he got caught so there was no point in covering it up.

Also based on the value the crypto was Monero (and he use Kraken, which is only big US exchange that converts XMR/USD pair), so he probably didn't realize even though it is difficult to directly trace where it came via the blockchain the exact unique amount deposited on KYC exchange fucked him. A naive Monero user would probably think "impossible to find where monero came or went from, so I'm safe" not realizing they're leaking out the side-channel by depositing a unique amount on a centralized exchange.