I wonder if she found out about the girlfriend and confronted him? The guy is guilty. You can tell just by looking at how he acts during the interview. If he has been crying or losing weight it certainly doesn't show.
I wonder why he isn't living in his house instead of the hotel? I would think you would want to be close to what was familiar and where you were happy once upon a time.
The house has probably been closed off as a crime scene, the police said last week that this was a murder investigation.