The family of Nolan Wells, lawyer Ben Crump, and Rev. Al Sharpton held a press conference Friday demanding a 'thorough' investigation into his death.

The family of an 18-year-old found dead after a July 4 boat trip off the Gulf Coast has hired civil rights attorney Ben Crump.

The body of 18-year-old Nolan Xavier Wells was found Monday off Horn Island, Mississippi. That's where he was last seen with friends Saturday. Crump says the family is seeking…