Hobbs Act robbery and aiding and abetting the same, in
violation of 18 U.S.C. §§ 1951 and 2, and the October 11, 2006, murder of D’Angelo Jordan
through the use of a firearm in connection with the robbery, in violation of 18 U.S.C. §§ 924(c)
and 924(j)(1) and (2). Five days after the murder, Williams was arrested in connection with a
separate attempted robbery of a drug dealer. He was arrested after fleeing the scene in a taxi cab
driven by cooperating witness Joseph Rosario. That same day, on October 16, 2006, Rosario
voluntarily gave a videotaped statement to a Bronx County Assistant District Attorney. In his
statement, Rosario stated, among other things, that he had never met Williams before October
16, 2006. In his subsequent testimony at trial, however, Rosario contradicted several statements
that he madein his videotaped statement, including by testifying that he had driven Williams to
the scene of the Jordan murder on October 11, 2006, waited while Williams and two other men
entered a building, heard several gunshots, and then saw Williams “rushing” out the building and
back to Rosario’s vehicle. In response to questions by the prosecution, Rosario admitted that he
did not tell the truth at several points during his videotaped statement, acknowledging, among
other things, that he had in fact previously met Williams before October 16.

        Before trial, Williams sought permission from the district court to admit the videotaped
statement into evidence in its entirety. The government opposed the motion, arguing that
extrinsic evidence of Rosario’s prior inconsistent statements was inadmissible because the
government expected Rosario to admit