As it has been proved many times, a cartridge dropped into a fire will not explode with sufficient force to cause the bullet to make more than a bad bruise on impact.
When Leaphorn was in the cave and dropped three revolver bullets into the fire, one of them "went off" and shot another character in the leg. When a live round explodes in a fire, there is no barrel to channel the explosion and project the bullet forward with any force. The brass casing swells and splits, and the bullet barely travels forward with any momentum, moving only a few inches.
When Leaphorn was in the cave and dropped three revolver bullets into the fire, one of them "went off" and shot Hoski in the leg. When a live round explodes in a fire, there is no barrel to channel the explosion and project the bullet forward with any force. The brass casing swells and splits, and the bullet barely travels forward with any momentum, moving only a few inches.
When Sergeant Manuelito asks FBI Agent Whitover what firearm he was carrying, he said he had a 9mm. Since the had to be before July, 1969 (because Season 2, Episode 2 featured the infamous lunar landing by Apollo 11 on July 16, 1969), he more likely would have had a .38 or .357 revolver because the semiautomatic pistols didn't become standard issue until the 1980s.
A blue NIGHT time sky. Obviously filmed in daylight with a filter to darken the scenes. Just does NOT work. The sky at night is ALWAYS black. The director should have filmed at night with flood lights. That works better.
A Ford LTD station wagon parked in front of hotel lobby is a 1973 model (wraparound turn signal indicators in the front and massive bumper).
Leaphorn's only ammunition is in his service revolver. A police officer would have more than 6 rounds on his person.