We know Joran is a liar.
We know the Aruban authorities who don't want this case solved if their actions are to be believed, have held him on good cause for some time.
We know the prosecutor thinks he either kidnapped or killed Natalie.
Is it just possible that they are as stymied as the rest of us? It seems to me like it is clear to any and all involved in the crime that all they have to do is remain silent and they can run the clock out.