There’s a significant difference between a sociopath and a psychopath. You appear to be referring to only an extreme form of sociopath as the term is now used:
http://www.youmeworks.com/sociopaths.html
Hi Lurk:
Sociopaths and psychopaths are the same. You may be referring to psychotics who are truly demented.
There are a lot of sociopaths out there. They often function OK in a group setting and are often charming and witty. However, if you get too close to one, one on one, RUN don’t walk in the opposite direction.
Prayers for the victims.