Initially this appeared to be some kind of mockumentary, but it becomes clear fairly quickly it's a real case involving real people, with much of the focus on two so-called internet sleuths who acquire an admittedly impressive list of information in their obviously abundant spare time...but mostly they just give audience to a demented loser who never found a positive outlet for his need to receive attention, and none of the details they dig up are actually useful in the eventual arrest and trial of this freak.
The documentary, however, tries to frame them as brilliant heroes who never gave up their remarkable efforts to bring a criminal to justice, when they are in fact equally narcissistic and very much complicit in his murderous behavior, despite their horror at his actions. The film also attempts to play like a fictional thriller, with the big reveal at the end showing all the little clues along the way it thinks its viewers were too stupid to recognize...but anyone who knows the movie Basic Instinct will identify the details immediately and wonder why no one in this story seems to catch on until it's all over.
A good documentary doesn't take a philosophical position on its subjects, instead presenting the information in a pure and unbiased manner -- thus allowing viewers to decide for themselves how to feel about the topic and events depicted...yet the writer/director of this trash chose to insult his audience and glorify despicable people who are too full of themselves to realize the harm they cause. It's compelling at times, but the overall effect is offensive and disappointing.