First lesson: if your underage CHILD is out all night with a "MAN", call the police.
yep!
and (this is a 'hindsight is 20-20' thing) not to confront right then. Where were his parents in all this -- esp. if he'd exhibited (ahem) "poor choices" in the past, as with that other girl? Did Kara's parents ever talk to his parents? Being it's a community / church / homeschool group thing?