I think by now we've all read enough of your effluent to come to our own conclusions about what it is you THINK you know. Thus far you've made it obvious that you know zero of basic psychology and you pick up out of context sound bites from novelettes rather than facts AND you get us to do the research rather than doing it yourself.
I do know zero about psychology. But do know one said Jeremy showed the classic signs of being a psychopath. A psychiatrist hired by the defence.
Other people hired by the defence said Sheila was not capable of going on such a murderous rampage. Sorry I forgot, she had not seen a doctor for 18 weeks. Perhaps she did not need or want to.
Out of context soundbites. It is either said or written. Or it isn't.