When Starsky & Hutch arrive Henderson states that Palmer fell from the third floor. Yet Henderson's pointing and the following shot pan well past the third floor making it look like Palmer fell from a more considerable height.
Jimmy delivers the money and Huntley opens the case. The two then get into a fight and the case is still open as the tussle continues. After the fight Huntley grabs the case which is now closed and locked down. It should still be open.
When Starsky and Hutch arrived at the scene of the shooting Detective Henderson states that the gun used was a .45. It would have been impossible for him, or anyone else, to determine the caliber of the weapon used at that point in the investigation.
The closeup shot of the gun used by Jimmy Lucas to kill the witness in his hotel room reveals that the silencer is pointing downward at a crooked angle. Jimmy also turns up the volume on the TV to cover the sound of the gun going off. This would have been unnecessary when using a silencer.