Mark Suppelsa goes inside the largest ATF lab in the country to find Chicago’s guns

CHICAGO, IL - MAY 06:  Members of the media shoot a small display of guns prior to a press conference with Chicago Police Superintendent Garry McCarthy in the Englewood neighborhood on May 6, 2013 in Chicago, Illinois. McCarthy said Chicago police confiscate an average of more than 130 illegal guns each week. On Saturday about a mile from the police station where McCarthy spoke, 47-year-old Denise Warfield was found stabbed to death inside as abandoned church building. Less than two blocks from Warfield’s murder, three men were shot while walking near the First Mennonite Church of Chicago shortly after midnight Monday morning.  (Photo by Scott Olson/Getty Images)

CHICAGO, IL - MAY 06: Members of the media shoot a small display of guns prior to a press conference with Chicago Police Superintendent Garry McCarthy in the Englewood neighborhood on May 6, 2013 in Chicago, Illinois. McCarthy said Chicago police confiscate an average of more than 130 illegal guns each week. On Saturday about a mile from the police station where McCarthy spoke, 47-year-old Denise Warfield was found stabbed to death inside as abandoned church building. Less than two blocks from Warfield’s murder, three men were shot while walking near the First Mennonite Church of Chicago shortly after midnight Monday morning. (Photo by Scott Olson/Getty Images)

WGN-TV anchor and daily contributor Mark Suppelsa joins Roe Conn and Anna Davlantes to talk about his two part series taking you inside America’s biggest bullet tracing facility where crime bullets from the streets of Chicago rank #1 as most the most analyzed.

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