Tries to echo the crime thriller/mysteries in pursuit of a theatrical serial killer like Se7en, Zodiac or The Bone Collector. But it fails. It feels very much as if Hangman intended to take one direction, but ran out of time or was forced to go in a worse direction. It's not complete garbage, but it is bogged down by a very awkward bit of copaganda in the middle, among other problems.
Final rating:★★ - Had some things that appeal to me, but a poor finished product.