Autopsy of Mississippi teen Nolan Wells remains inconclusive

Independent autopsy by Dr. Roger Mitchell found cause and manner of death of Nolan Wells as 'undetermined'.

Report noted red discoloration on back of head and missing body parts, including parts of throat, preventing full examination of key organs.

Civil rights attorney Ben Crump released findings at NAACP National Convention, stating foul play cannot be ruled out.

Official Mississippi autopsy remains incomplete pending toxicology results, according to Jackson County Coroner Bruce Lynd.

Nolan Wells' mother, Christine Wells-Wonsley, expressed family's frustration: 'the only question that we have is what happened to our son'.