The frenzy of Michael S. to go to any length and to keep fighting to get Terri killed indicates that at best that he is not normal -- more likely he wants to make sure his attempt to murder her will never come to light.
It seems to me he believes he is withnin his rights to kill someone who is in his way. There is no remorse. Frenzy is right, he is out of control. The longer he is in the spotlight the more he will show his true colors.