The suit alleges Milwaukee's police department has been used to unfairly target black and Latino residents. The police chief rejected the claim.
The hot-tempered TV chef and his in-laws have been feuding ever since Ramsay fired his father-in-law in 2010.
Secretary of State Rex Tillerson headed to Mexico to visit President Enrique Peña Nieto in an effort to help soothe tensions.
They launched the campaign after 180 gravestones were toppled at the Chesed Shel Emeth Cemetery just outside of St. Louis, Missouri over the weekend.
Dakota Pipeline protesters heeded the Wednesday afternoon deadline to vacate the encampment that has been their base since August.