I'm not saying it exists. But it will.
same tired bullshit, was said about sociopath the only link found (which is strenuous at best and no way an indicator that the person is prone to being sociopath) was brain structures that develop during childhood.
and more then that its found that the vast majority of people who would be judged as a sociopaths are not violent anyway.
it just isn't supported by the overwhelming majority of studies. a few routinely pop up and then get shot down under peer review its happened time and time again.