Just out of curiosity, how would have you done it?I havn't been following this case closely but my understanding of it is basically.
1. Guy and his girlfriend took off on a vacation in a van.
2. Guy returns home without girlfriend. GF's parents call police
3. Security cam photo shows van at a place they traveled to.
4. GF's body is found nearby to where van was photographed
5. Guy disappears soon after GF's body is found.
You know it amazes me that people will plan out murdering someone but can't come up with a better plan to try and get away with it than "return home without her and hope her parents never ask where she is."
But than again I'm kind of glad he's an idiot. Makes justice easier.