It is impossible in most cases to assign a weight to the genetic and the environmental components. These studies appear to point to environmental origins of anti-social behavior. These studies must be interpreted with great caution, however, as some began during the 1930's, a period when eugenic theories predominated. There are no studies linking individual genes to crime, with one possible exception. It means that there is one unfortunate family.
Many mutations affect only one family.
A walk through the posters at the annual meetings of the American Society of Human Genetics is likely to show several hundred individual families, each with unique genetic syndromes never seen before. Finding a unique mutation in one family says nothing about crime or about solving social problems. American Journal of Psychiatry , Vol. Genetics and Violence. A Commissioned Paper for the Panel on the Understanding and Control of Violent Behavior.