Yes, but the effect on coffee drinking preferences is not limited to those engaging in crime: plenty of ”normal” people have these gene variants, and it’s likel

Yes, but the effect on coffee drinking preferences is not limited to those engaging in crime: plenty of ”normal” people have these gene variants, and it’s likely the criminal outcomes don’t manifest at all without childhood abuse, or they manifest in non-violent ways, e.g. white-collar crime or substance abuse.