This story is too hot right now. I believe that they kept Joran to try to wear down the family so that they might leave or at least the story will die down. Also to keep them from spilling whatever beans they have at this point. I feel like the plan is to let him go after 60 days - end of story.
Evil triumphs when liberals and criminals control the criminal justice industry. That is what you are seeing here. Aruban LE is not all evil or complicit, they are just outnumbered by those who are.