By Mattathias Schwartz One afternoon in the spring of 2006, for reasons unknown to those who knew him, Mitchell Henderson, a seventh grader from Rochester, Minnesota, took a .22-caliber rifle down from a shelf in his parents' bedroom closet and shot himself in the head.

By Anick Jesdanun THE ASSOCIATED PRESS NEW YORK -- At first glance, the posting looked like any number of Internet classified ads explicitly seeking sex.

At first glance, the posting looked like any number of Internet classified ads explicitly seeking sex.