Think of the possibilities for criminology!
An errant fart while committing a crime leaves microscopic poo particles floating about the crime scene.
One micro-bacterial analysis later, compare to your database of samples, and you have your man!
(And it would be a man. We all know ladies don't ever break wind, even when committing the most heinous of crimes.)
It's how games started, and some of the most famous games and programmers in the past started - little more than technical demos.
Think of the possibilities for criminology! An errant fart while committing a crime leaves microscopic poo particles floating about the crime scene. One micro-bacterial analysis later, compare to your database of samples, and you have your man! (And it would be a man. We all know ladies don't ever break wind, even when committing the most heinous of crimes.)