They need to improve the writing also. From all the CSI type thrillers we know throat slitting is a messy bloody method of killing. Why were the floormats from the rear where the murder took place in pristine condition no blood or bloody foot prints? How did the perp. escape being covered in blood and attracting attention when he exited the car? Arterial spurting should have coated the windows and interior and occupants, they did show a knife at her throat before she stopped struggling so the slit throat would be presumed to be cause of death.
DVRing and replaying does reveal some faults in the production.