Mass shootings in Colorado and Georgia in recent days are once again calling spurring calls for new gun control measures. U.S. Senate Democrats say they are pushing toward a vote this week, and President Joe Biden says “we have to act,” urging Congress to close loopholes in the background check system. The man who wrote Connecticut’s first-in-the-nation “red flag” gun law in 1999 says such measures work to prevent gun violence. Mike Lawlor, now a criminal justice professor at the University of New Haven, is a former longtime Democratic member of the Connecticut House. He also served in the Malloy administration, working on criminal justice policy.