Just my psychobabble thoughts for the night.
You know those killers who ENJOY talking about their crime?
Who RELISH the attention that they get?
Who like the pain that they cause?
The fact that only THEY have the knowledge that so many people want?
They basically say
"Yeah, she's dead but you'll never find her."
That is what Alex reminds me of.
That is how I see Alex behaving in an interrogation.
It is a GAME to them. A mind game, where they get to be in control.
Just sending them on a total wild goose chase for a while.
Then they call him out and tell him they know he's lying about everything.
At that point he will basically taunt them by admitting she's dead but not telling them anything else.
Refusing to lead them to her body.
Refusing to allow the family closure.
Refusing to explain what happened to her.
The more sophisticated ones scam some money out of the deal.
I don't even think it's a self preservation thing at this point. I think he knows they are going to charge him either way.
I think he's just enjoying making everyone suffer. But, they can't suffer if they still have hope she's coming home right?
So he's got to tell them she's dead but then not give them her body for the closure they need. Take away both the hope and the closure. Evil.
Just like in Natalee Holloway's case. Also in some serial killer cases, though I am blanking on names right now. But Natalee Holloway is a great example, Alex totally reminds me of JVDS.
Those who followed that closely will see the personality parallels now that I've mentioned it. When you look at it from that perspective, figuring out what Alex might be thinking is a bit easier.
Alex wants to have the upper hand. When it benefits HIM he will reveal where she is. If it doesn't benefit him he will stay quiet.