PHILADELPHIA — Two men have been taken into custody in connection with the mass shooting on South Street in Philadelphia, including an 18-year-old who prosecutors say fired a homemade “ghost” gun into a crowd Saturday night and was one of several gunmen in a melee that left three people dead and 11 wounded. Police took that man, Quron Garner, into custody shortly after the shooting, when he ran off after a police officer who saw him firing shot him. Garner was crying out, “They shot my hand off,” when police took him into custody. He is now hospitalized, and is expected to be charged with atte…