[JURIST] The American Civil Liberties Union filed a lawsuit [press release] against the US government Wednesday on behalf of a US citizen detained by US forces in Iraq since May 17. Cyrus Kar, a 44-year-old filmmaker [Los Angeles Times report], was in Iraq shooting a historical documentary when he was stopped at a checkpoint. According to the Pentagon, the taxi he was riding in was packed with a component of explosives, and he has been held in military custody since then. He has not been charged and an FBI agent told his family that his story checked out. Four other Americans are also being held for separate incidents [AP report]. The ACLU complaint [full text] alleges violations of constitutional rights, federal and international law, and US military regulations.