Through my amateur research, it's my understanding that substance abuse is actually listed in the DSM-IV and is in itself a mental illness. When we separate substance abuse from other forms of mental illness, we don't mean to say that they're not all mental illnesses. But it's helpful to have that dichotomy, because they have different treatment plans, and I suppose that they indicate themselves differently.
Do you believe there is a linkage between those mental illnesses, whether they're detected or not, and the committing of the crimes for which those people are in jail?