biometric containment (privacy, fingerprints, dead utah blondes)

So the neighbors of that dead blonde Utah jailbait volunteered their fingerprints, presumably for discounting them, though possibly not. In any case: how could a neighbor-friendly cypherpunk give prints which were *not* entered into the Fed Oracle? Only way I can think of is to physically control your deadtree print sheet and require the Feebs to manually enter the dozen topo-feature-locations of your print from a memoryless measuring device, (eg, a glass lens and reticle) in front of you, then take the print sheet with you. How you verify that the imaging system is memoryless is up to you. Comments?