Could Trump end up in the dock?

Donald Trump has 58 bedrooms and 33 bathrooms at his Mar-a-Lago resort residence in Florida. These interesting statistics for Trump's faourite home appear in the search warrant for the FBI raid. Fortunately for the FBI they didn't have to search every bedroom and bathroom but were ordered to focus their efforts on storage sites, notably the room wonderfully called the 45th Room. Do all past presidents have rooms with the number of their presidency stamped on them? The big question is, what on earth was Trump doing with all these "classified" documents in his safe and elsewhere? What was he intending to do with them. I see Russian TV is having a laugh saying the classified docments allegedly detailing new US nuclear weapon designs had been very useful. But seriously, why did Trump take them home with him? He knew for absolutely sure that it was wrong to do so. He claims he had declassified them but not even a president can do that off his own bat. There has to be a carefully-followed procedure before any top secret document can be declassified. If the case is proven against him, could the 45th US president really be charged with a criminal offence? Trump in the dock?! Oh my goodness. I seriously doubt it will happen but in the United States of America you can never be sure of anything anymore.