BOSTON — Two U.S. Marshals Service officials wearing makeup, wigs and beards to disguise their identities took the stand Wednesday in the trial of a former New England Mafia boss accused of killing a nightclub owner in 1993.The officials, using pseudonyms, described how Francis "Cadillac Frank" Salemme left Atlanta where he had been living in the Witness Security Program and later was arrested at a Connecticut hotel after club owner Steven DiSarro's remains were found in [...]