The livery on the "Norfolk PD" squad cars is incorrect. The show depicts a dark blue paint with blue and red horizontal striped graphics, whereas the actual Norfolk, VA cars are painted white and have black, dark blue, and red diagonal striping (short).
(at around 34 mins) Shortly after Ryan Hardy is exiting a vehicle into the Lighthouse Bed and Breakfast, you can see a crew member move around inside of the SUV. The person is a male with a baseball cap who quickly ducks his head behind the steering wheel.
Joe Carroll says, "the eyes are connected by seven muscles." There are actually six, the four rectus muscles and the two oblique muscles.