Or they got a search warrant and found his 24 words, in his house or safe deposit box. Or they surveilled him and found where he hid them. It's pretty hard to k

Or they got a search warrant and found his 24 words, in his house or safe deposit box. Or they surveilled him and found where he hid them. It's pretty hard to keep your keys safe from an attacker able to do that sort of thing, without adding serious risk of accidental loss.