The Brady Law is found to exert a slight but statistically significant effect on both outcomes whereas “right to carry” (RTC) laws fail to exert statistically significant deterrent effects on either outcome, gun homicide rates or total homicide rates, and both results provisionally contradict earlier gun-policy outcome research. 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 review by a National Academy of Science Research Council strongly suggests that previous research evaluating gun policy outcomes may be unacceptably flawed methodologically, casting significant doubt on the validity of the results. The research in this study adjusts for those flaws to revise the current knowledge of the effects two common gun interventions, the Brady Law and RTC laws might exert on both gun homicide rates and total homicide rates. Tables, references