When young girls like Grace from A Northern Light go missing, the search isn't all up to the cops. Search parties often include volunteers, too--people like you, with a passion for getting involved, a desire to help others, and endless faith in a happy ending. (Does that describe rgz or what?!)
If pitching in on a search and rescue (SAR) team sounds like something you're suited for, check out the National Association for Search & Rescue website.
They offer loads of classes and conferences throughout the U.S. to train volunteers - usually ages 15 and older. You can also contact your local police department, as many communities have SAR programs and welcome all the help they can get.