Based on what we know, there are three major legal takeaways from the FBI’s search of Donald Trump’s Florida home on Monday.

First, this is a big deal, historically and constitutionally speaking. As far as I can tell, a criminal search warrant has never been executed against a former president.

Second, from the perspective of criminal investigation, the surprise raid was a highly unusual, aggressive step. In almost all criminal investigations of nonviolent conduct, the Federal Bureau of Investigation and Department of Justice would have requested cooperation from the defendant’s lawyers, not surprised the defendant and broken into his safe.