As the Sheriff pulls up to the burning house, two firefighters can be seen carrying a hose towards the house, the first shot shows them close to the house, unrolling the hose, the second shot shows them further away, carrying the rolled hose, and the third shot shows them close to the house, kneeling, spraying the fire.
Forensic analysis of a bullet removed from a corpse can tell you the bullet caliber (in this case .38 special), assuming it is not too fragmented or misshapen. It will not tell you the exact make, model, and manufacturing year ("Smith and Wesson Model 10 made in the 1920s") of the gun from which it was fired.
That would be akin to telling the make, model, and year of a car from looking at a tire track in the mud.
That would be akin to telling the make, model, and year of a car from looking at a tire track in the mud.