According to Sheriff Jimmy Harris 22-year-old Tyler Ryan Blansit confessed to killing 45-year-old Sherry Ann Blansit in Mentone. Multiple news outlets have reported she was found in her backyard Friday. Harris says Blansit told investigators he and his mother argued over grades and that he struck the woman in her head. Harris says the woman appears to have died of blunt-force trauma. A University of Alabama-Birmingham directory says Blansit was studying biology. Blansit is charged with murder. He's being held without bond.