[Junior]

There would definitely be no serial killers; no matter how much two crimes had in common, because no one saw either happening, it would be impossible to claim the same killer was responsible for both.

[PatrickHenry]

There would be no science of criminology. No reason to look for clues, and no purpose in studying a criminal's modus operandi. After all, things that happened in the past are forever unknowable. Any attempt to figure out what happened would be dismissed as a "just so" story. Think of it -- the whole world walking around like the OJ jury! It's creationism's version of heaven on earth.