WIGGINS, Miss. - The mother of a black 15-year-old in Mississippi says when white schoolmates put a noose around her son and pulled it, they didn't leave a physical scar, but may have left a life-changing emotional wound.

The Stone County Sheriff's Department is investigating. Mississippi NAACP President Derrick Johnson is calling for federal authorities to investigate a possible hate crime. The FBI says it's aware of the incident but wouldn't confirm or deny an investigation.

One student has been suspended from school.

Stacey Payton described her son as peaceful and said he was friends with the boys involved.