Danger spoilers ahead:
I had to give 3.5/5 stars. The movie's length did not do this story justice IMHO. An hour and twenty-five minutes to cover this much backstory and let characters breathe, just not enough time. Plus the red herrings on certain past plot points really takes from the momentum. The murders are glossed over and don't ripple throughout the plot, urked me. The college restroom scene, albeit cool did not add anything to the plot or intrigue.
Despite it's shortcomings it's a decent outing for what it tried. Just no time to breathe and explore what it laid out for you.