A lot of this is already public.Could be a plethora of reasons. How was the first incident reported? Who took the report? When did an investigative unit take conduct? Was it multi-jurisdictional to begin with? Perhaps there were legal or investigative oversight at some point. We won’t ever know until it becomes public one day.
Was reported to London Police with days (I think the next). Somehow the accused were almost immediately notified. Accused subsequently badgered EM into withdrawing the complaint/ not cooperating. Investigation bottom drawered until enough time had passed to close it.
It was re-opened in 2022 after the story around the civil settlement went public.