In the 2017 prison movie Shot Caller there’s a character played by Jeffrey Donovan, a neo-Nazi gang member, who reminds me of a Zodiac. Normal-looking but creepy and cold-blooded. Very depressing and violent movie but it accurately portrays the carnage of the American prison system. Donovan would be a good casting choice if you were going to make another Zodiac drama. John Carroll Lynch was told to play ALA as an innocent man…