From the research on impulsivity and the other things I listed several times, a logical hypothesis is that genetics plays a role in disparities in antisocial behavior by groups. The research would then be subsequent to such a hypothesis. There is no way you graduated ND without learning this. Very little, if any, is out there, because demagogues like you and Chris will shout down anyone who attempts to even broach this subject. That should not be something about which you are proud, but you apparently are.
And you still haven't provided a whit of research that backs up your assertion that environmental factors explain most or all of the disparities.