This is what he apparently said, though I'm not positive where it was taken from. It looks like a Slack chat room.
The first BTC seizure by courts will occur this year. Not with keys. By miners (nodes) acting to fulfill a court order. Without keys, BTC will be confiscated. Code is law, and courts can mandate patching code. Bitcoin is not encrypted. It is economic.
Not exactly in line with the whitepaper, is it?
Not at all possible, either. Good luck with some UK court forcing half of the miners in the world to validate an invalid transaction and also getting all the nodes in the world to go along with it.