If you are willing to consider murdering your business competition, you are probably a sociopath.

Actually, considering something has nothing to do with being a sociopath. Neither does doing something. A lack of conscience is a hallmark of a sociopath. Killing someone does not make you a sociopath. Showing no signs of conscience over the killing points toward you being a sociopath.

He was sentenced to the maximum for consistently showing no remorse for any of his actions. Thus, sociopath.