Okay.
I mean, my stance on that is, 'obviously'.
Why would his grandson's opinion matter? All it can do is inform the world he's from, which is the same world his grandfather is from.
Trying to discredit someone who doesn't need discrediting in the first place just reeks of desperation and attempting to divert the discourse from the actually important bit: whether some stupid old man shot a child in the head or not, and why.
Using his MySpace-esque bio to show he's a dummy is pondlife-level low. Who gives a fuck how smart he is? He agreed to be interviewed, he spoke, it won't impact the court case, who cares? Shame him some more?