Use the Internet to gather crime statistics on age differences or over-time trends in internalizing problems (such as suicide), and externalizing problems (such as violent behavior) and the use of drugs or alcohol.
Various government agencies have compiled information on a whole range of psychosocial
problems, from depression and sexual victimization to violence and homicide.
These sites will get you started, but if you don't find information on the topic
you want, search the sites.