90% of the time, the victim knew the perp. 90% of that time, it’s the spouse or boyfriend.
Waiting for 11 hours is pretty hard to explain, if during that 11 hours he received some sort of notification that she was kidnapped.
The only way it makes sense is if he was warned not to contact the police.
More like 99% of the time for both. Eleven hours is a nice chunk of time to dispose of a body while you make up a story. If she’s still alive, I’ll eat my hat.