Story highlights A 22-year-old man killed his mother during an argument over his grades, authorities say

The killing happened in Mentone, a small town in northeast Alabama

(CNN) A 22-year-old man home from college killed his mother after they argued about his grades, authorities in Alabama said Saturday.

Tyler Ryan Blansit called 911 on Friday afternoon, Mentone Police Chief Brad Gregg told CNN.

When officers arrived at the family residence, they found Sherry Ann Blansit's body in the back yard, he said.

Blansit confessed to killing his mother, 45, after they got into an argument over grades, said DeKalb County Sheriff Jimmy Harris.

She died of blunt force trauma, Gregg said, with the weapon being a baseball bat.

Read More