According to The New York Times (http://nyti.ms/qUmRp7), the lawsuit alleges the family kept the woman a prisoner in their Queens home for 12 years under threat of death.
The suit was filed by Oak-Jin Oh last week in Manhattan federal court. It names Soo Bok Choi, a Buddhist monk, two of his brothers, his son and daughter, a niece and the representative of the estate of his mother, who died in 2009.
The Times says it visited the homes of three of the defendants but efforts to reach them for comment were unsuccessful.
A spokesman for the U.S. attorney's office in Brooklyn declined to comment.