There is compelling evidence from behavioral genetic research that heritable influences are of importance in the development of antisocial behavior; approximately 50% of the total variance in antisocial behavior is explained by genetic influences. Yet, there is also evidence of a large environmental effect, both shared and non-shared environmental influences have been found to explain the remaining half of the variance.
Obviously I don’t mean to suggest that everyone with ASPD is a serial killer, it presents in a number of ways, but it’s hard to imagine a serial killer without some sort of disregard for the value of life. This is probably one of many factors that tilt the scale toward violence being much more associated with men.