Ah, I see. My bad for assuming. Can't seem to break that habit.
Ok then, as a matter of speculation and nothing more, I "assume" that most psychological schools of thought would hold that being conscienceless is an expression of some kind of personality disorder. Maybe they'd go with schizoid if there is no alleged intent to harm.
I don't buy it though. Being without a conscience is just a variation on the human personality theme. It's different but different doesn't necessarily equal pathological.