When Daryll tightens two wires around the heap of paper trash, the wires are parallel. In the next scene, the wires cross in an X shape.
When Darrell coaxes the horse to lie down, it is still saddled. As Darrell walks back to Toni, the horse is still lying on its side, but wearing no tack except its bridle.
There is a security camera very obviously placed in the outer office outside of where the murder takes place, yet during the investigation no mention is made of it. However, perhaps (circa 1981) it's a closed-circuit, live feed only (no recordings made), and no one viewing the live security screens noticed anything unusual.