We do not know if he has Bitcoin in his wallet. But carrying seed notes to access our wallet wherever we go is something absurd. Whether intentionally or not, we can leave the recovery seed in a safer place. This becomes an experience and a lesson for us not to take risks with wallets or recovery seeds. We might also find ourselves in that person's situation. Take care of your assets.
I cannot imagine why a single person would bring his seed phrase wherever he wants to go. This is only putting his investment at a high risk, instead of safeguarding it 24/7 and keeping it at the most safest place. Now that the cop officer has seen it, I don’t think it’s still safe anymore. Any moment after that, everything he had worked for so many years will be gone in an instant.
This is a wake up call for every investors out there. Always prioritize the safety of your coins, and with that, never put into compromise your seed phrase. Your seed phrase is your only access, showing it to anybody is like giving your hard-earned money to anyone for free.