The civil rights group filed a complaint one day after the Border Patrol postponed an Election Day "crowd control" exercise.
The judge ordered the administration to begin finding missing parents and to reunite them with their children.
Many Spanish-speaking parents said they did not understand the English documents they were signing.
A ruling allows a woman featured on our site, who was reunited with her son after months of separation, to sue federal government to stop the practice.
In the Gulf Coast town of Santa Fe, high school football games had always kicked off with a prayer, but in June the U.S. Supreme Court ruled that the practice violated the separation of church and state. Now the issuewhich has turned neighbor against neighbor and provoked some decidedly un-Christian behavior has grown from a local controversy into a national one.