I think we all know what the late shot was.Rumor is the 911 caller thought there was some romantic interest between Nichols and somebody she (caller) was involved with.
The cops were all shot with 'friendly fire' - my understanding is there's forensic evidence the unfortunate couple not only never fired a round, but that Tuttle was shot in the back trying to flee.
I want to know what the shots fired over 10 minutes after the initial assault were about, that's never been answered!
It was not the dog. Dogs that live inside tend to chill next to their people. Dog was taken out when Nichols was. One of the murdered people in that house were not quite murdered when that shot was heard.The dog. Witnesses reported hearing Tuttle calling for help for some time while cops kept the area "locked down" looking for the mythical third suspect.