The Effectiveness of Deterrence The deterrence theory just like any other study done in the criminal justice field has, evidence to prove if it works or if it does not work. This part of the essay will look into the evidence on the deterrence theory. First we must define what exactly deterrence is. Deterrence is a way to punish those who have commit crimes, and in return deter other from committing a crime. It is proven, that majority of the time people tend to commit crimes because