Fadil was a sadistic sociopath. - Fadıl sadist bir sosyopattı.
The hallmark of a sociopath is a lack of empathy. - Bir sosyopatın alametifarikası, empatiden yoksun olmasıdır.
A sociopath is the same as a psychopath. someone whose behaviour towards other people is considered unacceptable, strange, and possibly dangerous psychopath (socio- + -path (as in psychopath))
someone with a sociopathic personality; a person with an antisocial personality disorder (`psychopath' was once widely used but has now been superseded by `sociopath')