[postmodest]

Except now the cops know that 1) this is indeed your phone and 2) you have just tampered with evidence and 3) that evidence is juicy

[pavel_lishin]

It's not tampering if nothing is erased, and if the only action is to disable biometric identification going forward.

[ygra]

If there is no indication about what happened beyond "could not unlock with this finger", that should be hard to figure out, right?