More than six weeks after 18-year-old Nolan Wells was found dead near Horn Island, Mississippi, the investigation remains shrouded in unanswered questions — but new developments are giving investigators and his family more material to examine.

One significant development involves Nolan’s digital records. His family’s attorney, Ben Crump, has said subpoenas have been issued to multiple social-media companies as the family seeks information that could help reconstruct Nolan’s movements and communications around July 4.

Nolan disappeared after traveling to Horn Island for a Fourth of July gathering with friends. His friends have said he remained on the island after meeting a girl, but his family has questioned that explanation, pointing to the fact that Nolan reportedly left behind important belongings, including his phone and keys.

Then came another major question: the cause and manner of death. An independent autopsy commissioned by Nolan’s family was unable to determine how he died and could not rule out the possibility that non-accidental factors contributed to his death. The official autopsy findings have not been publicly released.

New reporting has also drawn attention to the history of drownings at Horn Island. According to data obtained by PEOPLE, no drowning deaths had been recorded there during the previous six years, although officials acknowledge that currents and sudden changes in water depth can make the area dangerous. This information does not prove foul play, but it has added another question to the investigation.

Meanwhile, pressure for transparency is growing. The NAACP has joined the legal team supporting Nolan’s family, calling for a thorough investigation and greater accountability. The Congressional Black Caucus has also sought a federal review, while the local district attorney says the completed investigation will be presented to a grand jury.