 Sherry Nolan says she already knew there was a gun crisis and is hoping for a change. Most of the individuals that commit murders, it's not their first time. Like my son's murder, it wasn't his first time. Two years ago, Congress passed bipartisan gun safety legislation following the mass shooting at Robb Elementary School in Uvalde, Texas. But since then, new gun safety legislation has gone nowhere. In Chicago, Megan Hickey, CBS News.