Miley Altman
Self - Mallory's Best Friend (3 eps)
Morgan Doughty
Self - Mallory's Friend (3 eps)
Diane Doughty
Self - Morgan's Mother (3 eps)
Michael DeWitt
Self - The Hampton County Guardian, USA Today Network (3 eps)
Bill Doughty
Self - Morgan's Father (3 eps)
Anthony Cook
Self - Mallory's Boyfriend (3 eps)
Keith Cook
Self - Anthony's Father (3 eps)
Beverly Cook
Self - Anthony's Mother (3 eps)
Paul Murdaugh
Self - Mallory's Killer (archive footage) (3 eps)
Alex Murdaugh
Self - Paul's Father (archive footage) (3 eps)
Mallory Beach
Self - Victim (archive footage) (3 eps)