Young couple goes on van tour of US, boy comes back with van - no girl

Dumb criminal or not? Use the card of the person you just killed leaving a "paper trail" of your involvement in her death by separating her from her card (he had experience of separating her from her ID so I guess he didn't give that a thought). He's smart criminal now the longer this goes on, but they'll find him eventually.
Smart criminals don't end up on wanted posters, they run for political office.