Sessions said the Nov. 5 shooting in Sutherland Springs, Texas, by Devin Kelley, a former Air Force serviceman who had a 2012 conviction for domestic assault, showed that not all the necessary information was being added to the National Instant Criminal Background Check System, or NICS.

In a statement, Sessions said he was directing the Federal Bureau of Investigation and the Bureau of Alcohol, Tobacco, Firearms and Explosives “to do a comprehensive review of the NICS and report back to me the steps we can take to ensure that those who are prohibited from purchasing firearms are prevented from doing so.”