A detective's quarrel

A twenty-eight year old detective, who has already had plenty of success over the course of the seven years they have worked, has spent a large deal of time dealing with one specific criminal case. Some mention this to have turned into an obsession- from a pin board on the ceiling to desks covered in newspapers about him, it almost seems to be all they care about. Although this hasn't stopped them from investigating other cases, they keep their focus firmly set on this one. Once a breakthrough happens, they might be able to catch him. Will they succeed in doing so, or will they once again be reminded of his elusiveness?

- Special credits to EL, my editor -