Then all we're left with is the assumption that Biden must have been responsible for what happened for no better reason than it being in his interests to do so, and not because he had any authority to order it. I say that Trump also had an interest in collecting the incriminating paperwork. Combine that with the fact that, unlike Biden, he had a history of weaponizing his office for his own personal political gain (particularly against Biden), and that, also unlike Biden, he actually had the authority to order the Secret Service around at the time, and on the face of it, Trump is a much stronger suspect than Biden.