The aftermath of Hurricane Katrina saw a sharp spike in gun-violence, which necessarily re-focused criminological research on the persistent question of how best to prevent gun-related violence. However, a Critical Review published by a National Academy of Science Research Council strongly suggests that previous research evaluating gunpolicy outcomes may be unacceptably flawed methodologically, casting serious doubt upon the validity of the results. The research here presented adjusts for those flaws to revise our current knowledge of the effects two of the most common gun-interventionsthe Brady Law and "right to carry" Laws-may exert on gun homicide rates and total homicide rates. The Brady Law is found exert a slight but statistically significant effect on both outcomes whereas "right to carry" laws fail to exert statistically significant deterrent effects on either outcome, and both results provisionally contradict earlier gun-policy outcome research, much as the academy report critically suggests.