Leave to go anywhere, Poirot. Abigail just confessed to a murder. No way should she be allowed to leave the police station, unless it was to go in front of a judge for a preliminary earring at least. (Or maybe it does not work like that in the USA, I don't know, Dr. Baker Fan can help on this.) Then, a bail would be set, and conditions would be imposed. So many things that should have happened and didn't. And as far as going to the prison to see Gabi, that's even more ridiculous. And don't get me started on those visits at the prison infirmary without any kind of supervision.