In my opinion, these are the two major contributing factors of the male criminal gene make-up. In study after study, results have shown that petty criminals tend to have a significantly lower pulse rate that do their well-behaved counterparts. This links us to high testosterone levels. These high concentrates have been found in those men who are more apt to have acted upon crimes of any violent nature. It is a natural fact that testosterone levels are responsible for forming muscle mass and strength.
Scientific studies abound establishing the link of testosterone to criminality.
In essence, the composition of a male criminal contains these three components. Not that these are the only factors in the genetic make-up of a male criminal, but they are the most pertinent. All these elements are derived form the environment that the male has developed in. Both are hunters - only in different environments. As William Spriggs said, It takes more that just a hormone to make a fellows trigger finger itch.