The show also follows renewed calls for federal scrutiny in the death of 18-year-old Nolan Wells, whose body was recovered on Horn Island two days after a Fourth of July boating trip. A Mississippi grand jury declined to bring charges and investigators said the evidence did not indicate foul play, but the state and independent autopsies listed the cause and manner of death as undetermined, leaving Wells’s family pressing for answers as President Trump said he was considering asking the FBI to investigate.