Mass Casualty Prevention Act; create crime of "mass casualty".

HB 1398, the "Mississippi Mass Casualty Threats Prevention Act," creates two new criminal offenses: "capital mass casualty threat" (for causing death or injury in a crowd during a mass casualty act) and "mass casualty threat" (for attempting such acts). It defines "mass casualty acts" as shooting firearms, using explosives, or driving vehicles into crowds with intent to harm, and mandates the death penalty via firing squad for the capital offense. The bill also amends Mississippi's murder statutes to include these offenses, requiring life imprisonment or the death penalty for convictions. However, the bill died in committee in February 2026 and never became law.