So many people talk about fingerprints, zap, match and catch.
Does anybody here knows what an unprinted fingerprint looks like and how it's to lifted and matched against the a printed fingerprint (like the one on your IC)? I ask you all imagine something. I give a you full clear thumb print and you go match it against a database of a million of so, computer provided, you go do it.
There's no laziness. If feasible and practicable, it'd be done. However, there's no guaranteed result. The offender could be wearing gloves or even just fist wrapped around with a piece of cloth. As I've said, very few cases are solved by fingerprints. That's mostly for verifying identities of people already arrested or dead. Most cases are solved by investigation and information, but no guarantee.