Colonel Morris Davis was the chief prosecutor for the Office of Military Commissions until he resigned his position in October. Today, in the Los Angeles Times, Col. Davis explains his decision. According to Davis, he reluctantly concluded that "full, fair and open trials were not possible under the current system" and that "the system had become deeply politicized and that I could no longer do my job effectively or responsibly." It's a powerful critique of the current system of military tribunals by someone who supports such tribunals, in principle, but has developed grave reservations about how they are operating in practice. My former colleague Amos Guiora has further comments on the AIDP blog here.