A member of the civilian border patrol group Ranch Rescue was arrested in Douglas this morning on charges stemming from a Texas illegal imprisonment case, an FBI spokeswoman said. Casey Nethercott was picked up by FBI agents and Douglas Police officers and charged with unlawful flight to avoid prosecution, Herskovitz said. Ranch Rescue is currently conducting patrols on a private ranch in Douglas. The Texas-based group started Arizona operations earlier this year. Nethercott is accused of pistol whipping and holding an El Salvadoran couple against their will in March. The immigrants were set free because the U.S. Border Patrol didn't...