So the film was decent, even with the plot holes, until the end. The whole framing of the blonde kid was lame. It should have ended with the cops driving the blonde kid away and the killer standing in the crowd with the travel trinket in his hand. The framing part felt forced.
The framing explains stuff we saw in film such as why killer never goes in ATM or why they show camera of David and Corey fighting or him taking screwdriver out of Corey.
shareIt was definitely lame. The biggest thing about it that makes no sense whatsoever, is when exactly did the killer edit that security footage? How could he have? It took him all night to get in the back door, and immediately started filling the place up with water. After the water started flowing, the whole assault on the ATM was over far before the killer could have possibly had the time to do that.
EDIT
Okay upon reading a few more comments, maybe that was just highlighting the parts that made him look guilty. Not necessarily that the killer edited the footage. While effective at showing how he would look guilty, I'm sure the entire rest of the footage wouldn't cast some doubt on that. So, still doesn't make sense.