Other mistake: The rectangular area of skin cut from the dead deer's rear side was not wide enough (or at the correct angle) to encompass the killer's entire bloody hand print; it would have missed the "pinky" finger (and possibly the tips of the second, third, and fourth fingers). Because the fingers were spread out, a shape more like an inverted isosceles trapezoid (or a much wider rectangle) would have been necessary. (00:42:52 - 00:44:09)
Other mistake: The passenger sideview mirror in Julia's patrol car is angled upward and toward the car (where the front passenger sits) and would be likely to reflect part of the car's passenger side exterior (maybe even the roof) and part of the passenger (in this case, John), but it shows clear views of trees and snow. (00:32:07 - 01:05:53)
Other mistake: Based on its position (facing the overhang), the "OPEN" sign inside the restaurant ("NEPO") would NOT be visible to anyone outside of the restaurant, thereby defeating its purpose. (00:36:35)
Suggested correction: It absolutely would be visible. What are you even talking about? The sign seems to be at roughly 5' or so off the ground based on its position in the window. The overhang seems to be at least 6' in front of the sign, AND at least a few feet above it. How is someone's view of the sign going to be obstructed by something above it? Anybody walking by would be able to see the sign! I've seen diners that have signs in pretty much exactly the same sort-of spot.
Other mistake: When PJ opens the door for the officers, the painting on the wall behind him is not straight as would be expected - it is how it would appear if looking down a hallway (the top and bottom of the frame are not parallel). (00:33:56)
Suggested correction: There's absolutely nothing wrong with the painting. It isn't parallel because the wall behind him is at an angle from the position of the camera. If the wall was parallel with the camera, then this "mistake" might be right... but it isn't. The wall is at about a 45 degree angle facing away from the position of the camera. (Although to be fair, even if the painting was crooked, I don't see how that would be a "mistake.").