Authorities in discovered a couple murdered and mutilated. The Knox County Sheriff says their 28-year-old son is responsible. Joel Guy, Jr. is accused of killing his parents, Lisa and Joel Senior, cutting them up and trying to dissolve them in acid. Investigators say they were last seen alive the day after Thanksgiving, which they celebrated with their son and three daughters. Lisa Guy's co-workers called police to do a welfare check and which led to them finding the couple.