Although I’m a bit of a skeptic overall, I’m comfortable with fingerprint evidence being used in court. That given, I think we all know that it’s possible for a clean fingerprint to be lifted off one source and conveniently planted somewhere else.

Guess what? Something much more convincing is now possible. It involves DNA evidence. Of course, you could always find DNA in somebody’s home and plant it in a crime scene, but in this case scientists can remove the DNA that currently resides in blood or saliva and replace it with a match to other DNA that was taken from, say, a drinking glass or a cigarette butt. Same blood sample, different DNA. How are we supposed to build a justice system around that?