They knew he had documents and wasn’t handing them over. That’s enough for a warrant.I find it rather funny that they raided Trump's home because they say Trump had top secret classified info and yet they had no idea what top secret classified info Trump actually had so they had to raid his home to find out because they didn't know. One thing they did claim in the beginning was that the classified info involved nuclear information and yet, apparently, no classified nuclear info was even found. Now they find a bunch of empty folders and they still don't know what was in them. Now, one would think that
1. They should know in the first place and
2. you'd think the folders would have some sort of code on them so that you could figure out what was actually in them and also to make sure top secret classified info wouldn't actually get misplaced in different folders.