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ERPO (Extreme Risk Protection Order)

Definition

A US civil-law mechanism (enacted in 21 states as of 2025) allowing courts to temporarily remove firearms from persons assessed as an imminent risk; provides a pre-attack legal intervention tool in jurisdictions that have adopted it.

Related terms

BNS 2023 § 113
The Bharatiya Nyaya Sanhita 2023 terrorist act provision (replacing UAPA § 15 as the primary substantive offence for many terrorism prosecutions); does...
BTAC (Behavioral Threat Assessment Center)
The FBI unit that provides training, research, and case consultation on targeted violence threat assessment; operational successor to the Behavioral Threat Assessment...
Channel Programme
The UK's statutory civil intervention pathway for individuals assessed as vulnerable to radicalisation; operated through multi-agency Channel panels, placed on statutory footing...
Leakage
Intentional or unintentional communication of intent to commit violence to a third party. One of TRAP-18's eight proximal warning behaviours and the...
Pathway-to-Violence Model
A five-stage sequential model (grievance, ideation, research and planning, probing and preparation, attack) developed by Calhoun and Weston and elaborated by the...
TRAP-18 (Terrorist Radicalization Assessment Protocol)
An 18-indicator threat assessment framework developed by Meloy and colleagues, comprising 8 proximal warning behaviours (pathway, fixation, identification, novel aggression, energy burst,...
WAVR-21
Workplace Assessment of Violence Risk, 21 items; an SPJ-style threat assessment framework developed by White and Meloy for occupationally-motivated targeted violence in...

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