Rage Room

The victim is found holding a revolver. The detectives when speaking of the gun say that it had a half empty magazine. Revolvers load rimmed cartridges and do not have magazines which take rimless ammunition. When searching the victims house they find a box of rimless cartridges although the victim's gun was a revolver. To cap it all later in the episode the father of another victim seeking revenge goes to his attic and takes out of hiding his pistol, which is actually the same revolver seen in the hands of the other victim earlier in the episode. I can only think they shot the first scene with a semi automatic pistol, had to reshoot it and had lost access to the original gun and used the revolver they had used in the later scene because it was the only weapon available to them at the time.

Otherwise it's an interesting detective story for people who don't understand guns.