Federal law has long barred people convicted of domestic violence or subject to a domestic violence restraining order from being able to buy a gun. But that restriction had only applied to an individual who is married to the victim, lived with the victim or had a child with the victim. As a result, it missed a whole group of perpetrators — current and former boyfriends or intimate partners — sometimes with fatal consequences. Dr. April Zeoli discusses her work in the area of extreme risk protection orders with PBS News Hour.