According to Douglas, the "homicidal triad" consists of three types of behaviours:<BR>1. Arson or fire starting<BR>2. Bed wetting<BR>3. Cruelty to animals. <P>It doesn't seem as if there is a lot about this triad in the book Mindhunter. Maybe I could find more somewhere else. Has anyone done any reading on this? <BR>It appears that a person who is going to become a murderer has exhibited some kind of behaviour in at least two of the three above. I think that's what he's getting at. The criminal might be a child that had been abused and wet the bed because of this and then started to light fires to create chaos and cause cruelty to animals to create their inner control. But one of these three would not mean homicidal behaviour, although I guess it depends which one, doesn't it? Bedwetting is certainly more innocuous than the other two. <BR>According to this theory, the killer of JBR would have had to be some kind of psychologically dysfunctional person who might be able to cast some pretence of normal behaviour but with an underlying disturbance (I am trying to steer clear of such terms as psychopathy and mania here). <BR>So not only would it not be John or Patsy (as they could not find any evidence about them that would fit this triad) then it could not be some middle class conservative that they were associated with either, could it? How well could somebody hide this behaviour? And again, was this behaviour seriously investigated in other individuals by the BPD? <BR>So I guess that leaves us with the Thomas Aquinas' of the world, does it not? The killer could have been in his late teens or early twenties considering he had probably graduated from a life of torturing cats and lighting fires as well as breaking and entering. He would have been pretty sophisticated by the time he got around to JBR. <BR>How does this fit with your theory? <BR>