A Kentucky family that sued to hold teachers and school administrators liable for a student's suicide over alleged bullying has lost its appeal to the state Supreme Court.

The court ruled unanimously Thursday that Stephen Patton's family failed to offer proof that the shy 13-year-old kid with a stutter was bullied at school.

Patton's family claimed that teachers and administrators knew, or should have known, of the bullying he suffered at Allen Central Middle School in Floyd County.

The eighth-grader shot himself to death in his bedroom in 2007.

The family had lost prior verdicts in a lower court and before the Kentucky Court of Appeals.