Michelle Miriam Davis , 60 , faces first- and second-degree murder charges . The shooting happened at a home in the 2600 block of West Madison Street around 12:30 a.m. on Saturday morning. Wells was found with stab wounds to her upper body , authorities say .
Michelle Miriam Davis , 60 , faces first- and second-degree murder charges . Police say she and her mother , 94-year-old Margaret Ellen Wells , argued before Davis fatally stabbed her . Wells was found with stab wounds to her upper body , authorities say .