This case is really interesting, I spent an entire day reading about it, there are some japanese pages with a lot of pictures of the hotel and crime scene.
It happened at the Cecil Hotel, which is known for several suicides and its criminal activity which includes three murders.Most notably, the hotel was the reported residence for serial killers Richard Ramirez in 1985 and Jack Unterweger in 1991. It is rumored to be one of the last places Elizabeth Short was seen before her murder in 1947.
Also be careful as there are a lot of creepypasta sites talking BS about the case.