Without a Trace - Season 1 Episode 11

The mayor of a New York state countryside small town where people lock cars nor houses had to call the FBI for the disappearance of a teenage school girl last seen at the school bus stop. While the team learns about the close community, the victim's confident friend also goes missing. The MO fits similar cases in other inconspicuous places roughly on a line, so it's feared the work of a traveling serial pedophile.