Charleston church shooting victims sue FBI over gun buy
Lexington County Sheriff Jay Koon told The Associated Press last summer that a clerk entered incorrect information for Roof's prior drug arrest, which prevented an FBI examiner from finding the arrest details when Roof tried to buy a gun.
"All of our clients ... are very committed to the lives of their loved ones not being lost in vain, and to use the forum which they involuntarily have been given to push for reasonable safety regulations," Savage said.
Roof is currently jailed pending death penalty trials in both state and federal court on charges including murder and hate crimes.