How does Carl react to losing his father in the novel, Taft?

After his father's unexpected death, Carl Taft becomes addicted to drugs. He has no particular preferred narcotic; he tends to sample many different ones. Carl can normally maintain while high, but at one point he nearly OD's. He begins selling drugs in Muddy's, but John finds out and confiscates his drugs. Later, the police arrest Carl while he is carrying cocaine. Near the end of the novel, Carl shoots John while trying to recover his drugs.