The producers are also interested in John Malkovich and Kurt Russell. Whomever takes his place the character he plays is described as a Doctor/Scientist outsider to the CSI unit who has the same genetic profile as a serial killer but hasn't previously acted on any homicidal impulses. Sounds like they are trying to make him into the Anti-Dexter.
Fishburne and Malkovich I could see, but I'm not sure about Russell.
Laurence Fishburne is prime "CSI" suspect - Yahoo! News