From CollegeStats.org, number 8 of 9:
A fact that goes hand-in-hand with boys’ high rate of incarceration is that they are up to five times more likely to die by homicide (as in 2004) and up to seven times more likely to die in a gun-related death than girls. These are the boys who got out of juvenile detention or managed to never be sent there and who raised their risk factors through certain high-risk behaviors, as laid out by the Department of Health and Human Services. These include early aggressive behavior, drug and/or alcohol abuse, hanging out with other troubled kids, and poor academic performance; in other words, all issues that could be prevented at a young age through education or other responsible adult instruction.
The whole list is here.