The Rev. Al Sharpton, left, prompts someone describing themselves as a friend of missing person Terrance Williams, right, to come forward during a press conference and share an incident he experienced with law enforcement who chased him on the beach. Media mogul Tyler Perry and the Rev. Al Sharpton held a press conference Thursday in East Naples to spotlight two unsolved missing cases, those of Felipe Santos and Terrance Williams. The two were last seen with former Collier County Sheriff's Office corporal Steve Calkins.