HELENA, Mont. (AP) — The U.S. Supreme Court has declined to take up the petition of an FBI agent seeking immunity against allegations that he failed to properly investigate the deaths of two men because they were Native Americans. That means the lawsuit filed by the families of the deceased men against Matthew Oravec can go on. The families of Steven Bearcrane and Robert "Bugsy" Springfield claim Oravec conducted only the most cursory investigations into the 2004 and 2005 deaths of the Crow tribal members.