Criminal Offenses - As enacted, clarifies, for purposes of criminal offenses relative to threats of mass violence on school property or at a school-related activity or failing to report such threats, that a threat of mass violence is credible if the threat causes another to reasonably expect the commission of an act of mass violence. - Amends TCA Title 39.

SB 591 creates two new offenses in Tennessee law: a Class E felony for recklessly threatening mass violence against child care agencies, preschools, or religious institutions via any communication method, and a Class B misdemeanor for failing to report such threats. The bill requires anyone who knows of such a threat to immediately report it to local law enforcement and the affected institution, including specific details like the threat's nature and the person making it. It also allows courts to order threat-related defendants to undergo evaluations for potential harm and mandates restitution for disruptions caused by threats. The law directly affects individuals making or ignoring threats to vulnerable institutions, with penalties taking effect July 1, 2025.