It looks close enough that you cannot discount the drawing. Add it to the freaky coinkydinky file and toss it in the mix.
Yes you can. Only people who are easily led by the power of suggestion see any resemblance, other than the fact that the drawing depicts a white man and Karr is white.
One thing I didn't put in my list, but may as well mention it now: The drawing shows eyes that are not deep-set. You can see the upper eyelids. Karr's eyes are set deeper and you can't see his upper eyelids.