What type of people are least likely to commit crimes?

If you are speaking of all crimes, and mean just things that are illegal, then the answer has to do with age, faith, culture, etc.

On average, the least likely person to break a law is a white, Christian, woman above the age of 80. Dead people usually don't commit too many crimes either but with the way the US is headed, it may not be long before the act of dying becomes some sort of offense.