There were a lot of signs that suggested there was clearly something not quite right, and I’m pretty sure the mother to Baby P’s mother was one of the first to say this.
You’re right Melody, a Chemical Imbalance of some sort, could have been a build up of anger/emotion over the years, an I have heard that they (Criminal Profilers) are wanting to carry out tests, which involved assessing young minds, in order to prevent such crimes from happening!!