Just watched the Dead Wrong episode of The New Detectives: Case Studies in Forensic Science. In the first story the initial investigator must have been one of the dumbest cops on the planet.
The Scene: A house was on fire, when the fire department had extinguished the blaze they found 4 bodies and called in the police. The police found a woman's body in the living room, she had been strangled. Upstairs two children in their beds had been shot. In the master bedroom was the final body - a man, shot in the head. Next to the man's body was found a gun with out a barrel.
Police Conclusion: Murder/suicide, the man had strangled his wife, shot his kids, set fire to the house and then gone to bed and shot himself. The detective then stated that the more he investigated the more sure he was that it was a murder/suicide.
I may not be a detective but I see one small flaw in the cops theory. Apparently after the man had fatally shot himself in the head, he removed the barrel from the gun and disposed of it, it was never found. So far as I know it is not within the capabilities of a dead man to dismantle the firearm and hide the barrel so well that the cops could not find it. Was the man one of the undead ? He had to be to be able to function after blowing his own brains all over the bedroom walls. Wonder how many murderers, rapist, pedophiles and other low life have gotten away with their crimes because of this moron.
Actual Conclusion: The murderer was a pedophile neighbour who wanted the 11 year old girl of the family but got paranoid that the father was setting a trap for him, so he murdered that whole family. It took them 2 years to work this out and the fact the idiot had left a recording of a verbal diary with his sister. The pedophile was sentenced to death, he was executed on 9 April 2003 - YIPEE.
I must state that I have a very high opinion of police, I have had two family members in the force, both are retired for medical reasons.