Time to have an OS with multiple fingerprints in it. If you give the correct finger or pattern of fingers you get in. Use the wrong ones and it wipes the phone (with a cloth?). Then the FBI not only needs your prints, they also need to know left middle, left index, left middle to get in. Use the right index and the data goes away.
Plus — record some of the prints upside down and/or sideways — and add in a few toes... ‘-)
That’s the way it’s always worked on iPhone if you try to unlock with an unregistered fingerprint 10 times, assuming you set the phone to behave that way when it’s being broken in to.