A military law organization says gruesome photographs in the case of a U.S. soldier charged with murdering an Afghan civilian should be made public.

Pfc. Andrew Holmes, of Boise, Idaho, is one of five soldiers at Joint Base Lewis-McChord charged in the deaths of three civilians this year. The Army Court of Criminal Appeals halted his prosecution while it reviews the Army's decision to keep the photographs secret.

The National Institute of Military Justice filed a friend-of-the-court brief this week arguing that the Army has violated Holmes' right to challenge the evidence against him, as well as his and the public's right to open legal proceedings.

Holmes' lawyers say one photo could prove that his weapon was not used to kill the man he's charged with murdering.