I’m sick of people who try to find explanations for all human behavior in the genes. They really really want to find genes that “explain” sexual orientation and proneness to violence. When they “find” one for violence, the criminal defense lawyers and bleeding-heart liberals will rush to exonerate everyone who was ever convicted of a violent crime. (you think I’m kidding?)
Meanwhile, other “scientists” are writing books “proving” that there is no free will.
They will find a y chromosome. In checking the data of multiple shooting perpetrators they will find a predominance of people with y chromosomes. Conclusion will be to destroy those with y chromosomes prenatally. Within 100 years we will have no crime at all, also no people.