The real-life counterparts to the fictional victims are in parentheses. * Jeremy Renner as Jeffrey Dahmer * Bruce Davison as Lionel Dahmer * Artel Great as Rodney (Tracy Edwards) * Matt Newton as Lance Bell (Stephen Hicks) * Dion Basco as Khamtay (Konerak Sinthasomphone) * Kate Williamson as Grandma * Christian Payano as Letitia * Tom'ya Bowden as Shawna * Sean Blakemore as Corliss