Having now snapped from all of the traumas, all of the pain and suffering he had went through, he finally set the prisoners of Gotham Asylum "free" by spraying them, Warden Reed was no exception. Now after finding out that you and James Gordon, now Captain James Gordon, are within the premises, he chose to go after you both—but for completely different reasons. You left him behind, Gordon killed his father in front of him those three years ago.