Retired FBI agent says Kirk case has a 'mountain of evidence'

Retired FBI supervisory agent James Gagliano analyzes the defense's strategy in the Tyler Robinson preliminary hearing.

Retired FBI Supervisory Agent James Gagliano discusses the defense's strategy in the Tyler Robinson preliminary hearing. The defense is trying to put a speck of doubt in the judge's mind regarding police evidence collection and DNA. Gagliano expects vigorous impeachment of witnesses and the state is not taking capital murder off the table.