That's partly why I'm posting this here. There must be something else going on. The paper with the seed words WAS NOT accessed.
If your nephew didn’t access that paper for years, it doesn’t mean someone hasn’t. Was it stored in a box with glitter nail polish on the lid ? Just something that can prove the location wasn’t opened without his knowledge. Believing it, is not enough.
Could he has noted those words on a block notes and the piece of paper below it recorded an imprint of those words that were recovered be someone else?
Have fun being a Sherlock! But I guess not much can be done.
Not sure the police would consider such a case as a valid theft (at least not yet)
That's what he did.
Then we have the whole Trust Wallet compromise on his iPhone.
He may have taken a photo of it. Maybe left it out on the table when a friend was over. Maybe wrote a text copy as backup and forgot he ever did that.