When Mrs. McBride goes to visit Purvis at the motel; she throws her coat on the sofa and lands stretched over it. But on the following cut, as she sits down with Purvis, the coat is now on the other end of the sofa and folded up.
When Detective Ryan is lying on the ground after being shot by Purvis; his coat is all bunched up behind him. But on the following cut after a cop car passes by; his coat is now all straightened out.
The small private plane chartered by Purvis is flying out of a small airfield. But the airfield and airplanes shown in the background of the tower is a major commercial airport with large passenger airplanes.
When the Tower notices another plane coming in for a landing on the main runway; the private plane was warned to pull up. But the private plane was still on the ground and not in the take-off stage. It was just taxiing and then it stopped, therefore, it made no sense for the air controller to tell the plane to pull up.
When Detective Ryan gets shot by Purvis as he is running away; he grabs his stomach. But Purvis was shot in the back and not in the stomach.