Was Stephen Griffiths a placid, generally happy person, with no history of violence nor of harassment of women, and with a brother and sister who insisted that he was so gentle that he could never hurt a fly? Was he in a stable relationship with a girl whom he expected to marry? What was his motive for murder?
No, Stephen Griffiths is nothing like VT, and I would describe him as somebody one wouldn't particularly want to know much about!! I am not even sure he ever finished his PhD---I was just illustrating the fact that it is perfectly possible for a highly educated person to commit murder. It is, quite possibly, unusual, but it's possible, and it happens.
I would like to think that a parent could not murder his or her own child, but some do.
I would like to think that religious clergy could not possibly be involved in sexual abuse, but many have been.
I would like to think that a wealthy person would not fiddle his or her taxes, that a police officer would not tell lies, that a prosecution lawyer would never hide anything from the defence. The list could go on and on.