Chapter 10: Bill and Tim are pursuing Haskins who has boarded a freight train, as Tim pulls up along side, the police car turns into a black coupe which strongly resembles 'Green Hornet's' "Black Beauty.' This short bit of scene is from The Green Hornet (1940).
When the freight is shown from a distance it is mostly stock cars. However when Bannister jumps on, it's a mixed freight of mostly box cars.
End of Chapter: 8, beginning of Chapter: 9, the broken truck light found on the road is not from the truck or the armored car. Both vehicles have all their lights when driving away to the secluded fenced off spot.
About 4:48 into Chapter: 6, the crooks car changes when it crashes off the road.
In Chapter: 3, when Detective Lt. Bill Bannister (Kent Taylor) speaks Spanish, its someone else voice.