Blood 13
血十三 (original)
A reckless female detective faces a gruesome crime scene in a basement bathroom during a murder investigation. A hardened fellow detective insists that her case is but a small piece of a larger serial killing spree which has haunted him for over a decade. To bring the killer to justice, she risks everything and puts herself directly in the killer's sights.
Watch "Blood 13" on Tubi TV released in 2018. It's a crime and drama movie, and has a rating of 5.4 out of 10 from Imdb which is fairly okay for this kind of movie, and is currently available to watch for free.