The most nefarious and crafty criminals are the ones who operate completely under the radar. In the computing world security breaches happen all the time, and in the best cases the offenders get tracked down by the FBI or some other law enforcement agency.
But it's the ones who go uncaught and unidentified (those who we didn't highlight in our Cyber Crime Hall Fame that are actually the best. Attempting to cover your tracks is Law-Breaking 101; being able to effectively do so, that's another story altogether.
When a major cyber crime remains unsolved, though, it probably also means that those of us outside the world of tech crime solving may never even know the crime occurred.
These are some of the top headline-worthy highlights in the world of unsolved computing crime—cases in which the only information available is the ruin left in their wake.