Those stats may be correct. However, one of the main reasons for this is because we keep letting people who commit crimes with guns out on parole as opposed to keeping them locked up indefinitely. This becomes more and more difficult as the jails and prisons keep filling up with pot smokers and small time drug dealers. And even in prison we can't seem to keep the weapons out of their hands because of their so called "rights". There are definitely holes in the system such as gun shows that require little or no background check and of course the advent of the internet where anyone can buy anything. Not to mention the number of kids who have no fathers to speak of and/or no supervision, whose only role models are the older members of their local gang, the inability of schools to deal with the little monsters before they become a real problem (teachers and administrators can't even look at kids funny without some asshole filing a lawsuit) because "my little johnny would never do anything bad" and how dare you treat my child like this.

Correct me if I'm wrong but I believe to this day the number one killer of teens in this country is still alcohol related auto accidents. And we all know how well alcohol prohibition worked.