After every mass shooting come the calls for new laws. Let us consider one of the thousands of existing laws: The Lautenberg Amendment to the Gun Control Act of 1968, which took effect in 1996, makes it a felony for those convicted of misdemeanor crimes of domestic violence to ship, transport, possess, or receive firearms or ammunition. This alone should have prevented the Texas killer from ever buying a gun.

The Air Force has admitted that it had failed to enter the killer’s domestic violence court-martial into a federal database that would have lit up his background check and blocked him from buying gun.

The shooter admitted to beating his wife and fracturing the skull of their infant son as part of a pretrial agreement. He was convicted in an Air Force military court in 2012 at Holloman Air Force Base in New Mexico. He could have received 30 months, but was only sentenced to 12 months and served a year in the brig at Miramar Air Force Base in California.

When you buy a gun from a dealer, a Firearms Transaction Record, or Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) Form 4473, must be filled out. Buying a gun requires a complete and signed Form 4473, government-issued photo ID and a National Instant Criminal Background Check System (NICS) background check