Shanga Hankerson, Glady Knight's son, believes the 81-year-old singer is showing signs of cognitive decline. Additionally, he believes her husband, William McDowell, is abusing the singer, forcing her to perform despite her condition.In addition, Hankerson says he's been kept from speaking to his mom and has now gone to the Department of Human Services for help.What's really going on with Gladys Knight? Well, The Shade Room's Justin Carter is checking into things on 'TSR Investigates.