Two friends of the men accused of killing Fairfield University football star Mark Fisher were charged with witness tampering yesterday — for trying to scare a witness by alluding to a mob-style whacking on "The Sopranos," prosecutors said. Assistant District Attorney Anna-Sigga Nicolazzi told a Brooklyn judge the pair were members of a tight-knit group called the "Ghetto Mafia" and were trying to hinder the ongoing investigation into the gridiron star's murder in October 2003. Basically, they picked up an individual and made a very clear reference to an episode of 'The Sopranos' where a witness cooperating with authorities was...