The CDC says:
How nice that the scientists think that simply having access to cars is one of the causes of drunk driving.Research has shown that certain factors make children and adolescents more susceptible to developing violent behavior. These factors include an individual’s characteristics or behaviors, including a history of aggression; beliefs that support the use of violence; social or cognitive problems; and the use of alcohol or drugs.
They also include family and community circumstances such as a parent’s use of alcohol or drugs; a lack of parental supervision or discipline; spousal abuse or child abuse; poor emotional attachment between parent and child; access to firearms; and divorce, relocation, or other family disruption.
Er, um, access to guns is a cause of violence.
And that access is similar to 'cognitive problems', abuse of alcohol & other drugs, child abuse...
It's either page 22 or 5... not sure how their numbering system works.
Contributing factor, sure, esp. when the kid uses a gun to commit mass murder.
But a cause???