b'In the early morning hours of February 7, 1992, a 79-year-old woman was brutally murdered in the Charlotte, North Carolina, apartment where she\\u2019d lived for two decades. Viola Pendergrass \\u2014 who neighbors called \\u201cma\\u201d and was revered as the matriarch of her own sprawling family \\u2014 was found stabbed to death in her bedroom. Her murder divided a once close-knit family and has stumped police for 30 years.'