If Biden, or even my granddaughter had taken 300-classified documents then refused to return them or lied about returning them, I would expect them to be held accountable. When my Brother Jim was spying on China for the NSA, I was responsible for a collection of documents on the construction of missiles for the government that were secret to top secret. Jim's clearance was higher than mine. But if I showed him one of those documents, I would have gone to prison. Jim had no "Need To Know," what was in my documents.