This has been the case for a long time (predating cell phones).. and it applies to any biometrics. If the information they need isn't secured inside your brain,

This has been the case for a long time (predating cell phones).. and it applies to any biometrics. If the information they need isn't secured inside your brain, there's no 5th amendment question. SCOTUS already ruled in Riley v California that you need a warrant to search a cell phone. So that answers the 4th amendment question. It doesn't apply in this case because he was on parole. This case changes nothing.