I can't find this information on the internet for some reason but I've seen countless documentaries discussing the subject. Petscans of inmates reveal a correlation between the kind of crime and the criminals brain. There is the normal brain, but then if someone who say stabbed his girlfriend in a rage gets a pet scan they will invariably have similar to the normal brain but an area is inactive that is active in normal people. This seems to be very precisely related to self control as people who had normal pet scans have recieved head injuries that caused this area to be inactive and in fact later murdered someone in a rage. But inmates who were serial killers or calculated killers who killed purely to kill, strangley have completely different pet scans. Not missing an area like impulse killers, but set out differently to the normal structure all together. Rather than having large active patches with some areas blank(like the normal brain) serial killers tend to have small patches scattered uniformly over the whole area. The internet seems to be completely devoid of this information or anything close to it. Or I'm bad at searching. Anyone know more on this? Anyone also seen the documentaries like understanding: murder or one of many others? Its not like I'm making this up, the internet just sucks.