I'm reminded of the (possibly apocryphal) stories of criminals who underwent various procedures to remove their fingerprints - methodical scarring, acid burns,

I'm reminded of the (possibly apocryphal) stories of criminals who underwent various procedures to remove their fingerprints - methodical scarring, acid burns, skin grafts from elsewhere on the body, etc: even the procedures that worked didn't actually help them evade identification, because the marks left by their now-printless fingertips were even more distinctive than before.