"Garden City, New York, USA. April 17, 2016. BERNICE SIMS, a campaign volunteer for Democratic presidential primary candidate Hillary Clinton, is working at the Canvass Kickoff at the Nassau County Democratic Office. Ms. Sims is a social worker, civil rights activist and author of the 2014 book ""Detour Before Midnight"" - her personal account of the last hours she and her family were with the Mississipi Burning civil rights workers killed by the KKK in 1964."