Because there is too much evidence of his guilt including by his own mouth on multiple occasions as well as by others in his employ in extreme multiplicity.
So attacking the validity of his guilt is a waste of time. What's left to do? Attack credibility attack motive attack records attack likes attack dislikes attack clothing attack autos attack attack attack attack attack. Anything and everything including the kitchen sink but stay the he** away from his GUILT.
Will they be effective attack dogs and shred the questioners to pieces? Vicious vile out for blood willing to do/say whatever it takes to protect the dementia don from ever being held accountable responsible for his actions and words? We will see if VICIOUS is valorous/victorious and wins and truth is the victim.
