The family of Nolan Xavier Wells – the 18-year-old football player who vanished after a Fourth of July boating trip with pals – will demand an urgent investigation into the teen’s death Friday, calling for the release of all records involving his disappearance. Top civil rights attorney Ben Crump and civil rights activist Al Sharpton will join Wells’ family for a press conference in Harlem, New York, starting at midday, Crump’s office revealed.