Jake Paul says he knows exactly why the FBI raided his home and, for now at least, he doesn't seem too concerned -- but he is making some changes to his inner circle.

Jake says it's only an "investigation" related to his trespassing case in Arizona.

Watch what he says about someone close to him "doing malicious things." He's hinting he caught a now former friend talking crap about him after the raid, but says he's handled the situation.