(CNN) An investigation into the death of Kendrick Johnson , the Georgia teenager found dead in a rolled-up gym mat eight years ago, has been reopened, according to Lowndes County Sheriff Ashley Paulk.
The body of Johnson, 17, was found upside-down in the mat in Lowndes County High School in January 2013.
The initial investigation concluded that Johnson accidentally slipped into the center of the mat while reaching for a shoe and got stuck.
An autopsy conducted by the Georgia Bureau of Investigation determined that the cause of Johnson's death was accidental positional asphyxia.
Paulk said his office received 17 boxes of written and electronic evidence from the federal investigation.
Paulk said some of the original investigators will be used along with some new investigators for the reopened case.
"My plan is to see if there are any discrepancies between the reports," said Paulk, who is leading the investigation. »