Mark states:
"I revered my father. It was a relationship of respect but also one based on fear. I was scared of him and what he was capable of, as so many people were. It was a fear that had been instilled in me as a child through discipline, threats and punishment. It was his way of bringing me up and conditioning me with a set of principles and ideals that would set me in good stead for life. It isn’t fair to say I was unhappy as a child – I didn’t know any better – but I knew somehow we were different.
If things were done his way he was a charming man to be around, but everyone seemed to fall short of his expectations at some point and he would unleash fury and spite onto them. Like any son, I learnt to understand him, how to mediate with him and appeal to his nature. Patience, flexibility and an appreciation for his perspective were key to this. I learnt to value these qualities, to be sensitive and respectful of the individual. We simply cannot afford not to be. Life thrusts all kinds of people together, we have to understand tolerance if we are to get by at all.
Ultimately, my upbringing made me who I am today and I can only be grateful for that. It was an environment where the incentive to achieve drove me to excel.
All very telling and why in the end Mark chose to murder his father.
I don't believe he's "sensitive and respectful" or "understands tolerance" at all. I think he's a cold and callous individual who attempts to hide behind a mask of sanity.
He may have fooled a few people but he didn't fool the police nor the courts.