So recently I've been talking to this friend of mine about his life and his feelings etc., and some of the things he has said, and things I have seen him do make me believe that he lacks remorse to a certain extent and lacks feelings of empathy towards just about everything. This friend of mine has had a rough childhood and many social/drug issues throughout his life. Hes been in and out of jail and rehab and he honestly says he doesn't feel about any of the violent stuff he has done. I have become very curious on the topic of sociopaths because of this and Google just isn't explaining things enough, I have more questions than it can answer. I was curious if anyone was an expert on this topic or has some expertise and could tell me what they know about this topic. All information given is greatly appreciated.