Police chief: Slow motion mass murder in U.S.

Anderson Cooper talks to Milwaukee Police Chief Flynn about his heated exchange with Senator Sen. Lindsey Graham of South Carolina at a Senate hearing on a proposed assault weapons ban.

The debate began when Graham questioned why law enforcement doesn't prosecute people who fail background checks when applying for a gun. His point was that the government should enforce current laws rather than enact new legislation.

Flynn's response was that the background checks are working in those cases by preventing someone who shouldn't have a gun from getting one. He explained there simply aren't enough resources to go after everyone who fails a background check.

Flynn called Graham's argument a "phony issue" and "red herring" distracting from the main issue. "We have a slow motion mass murder in this country every year – it’s our homicide statistics. And then we have the horrific tragedies as in Aurora and Newtown that shock the conscience," he told Anderson.