INGLEWOOD, Calif. — Civil rights attorney Ben Crump joined the parents of 18-year-old Nolan Wells in Inglewood, California, on Monday to renew calls for a federal investigation into the Ocean Springs, Mississippi, teenager's death.

Crump and the Wells family spoke at 2 p.m.

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Wells went missing on the 4th of July after going on a boat trip with friends to Horn Island, according to authorities. It appears Wells stayed behind on the island after his friends left, officials said.

The college football player's body was recovered on July 6, and authorities said they suspect Wells drowned. Jackson County Sheriff John Ledbetter said there was no initial indication of a crime, but he stressed that investigators are "working diligently to determine exactly what occurred."

In September, a grand jury said that Wells' friends were not involved in his death.