MVIs require coordination across an entire agency, and the QRG is structured to reinforce that shared effort.

When a mass violence incident (MVI) occurs, police leaders must act decisively in an environment defined by urgency, uncertainty, and intense public scrutiny. These incidents place extraordinary demands on agencies as they work to neutralize the threat, protect life, coordinate with multiple partners, and communicate clearly with the public. In these moments, coordination and clarity are not optional; they are essential.

The reality of a mass violence response is that leaders are required to make consequential decisions while managing the emotional impact of the event on their personnel and in the broader community. Recognizing the complexity of these situations, the International Association of Chiefs of Police, through the Mass Violence Advisory Initiative (MVAI), developed the Mass Violence Incident Quick Reference Guide (QRG) to help agencies prepare for, respond to, and recover from MVIs.

Developed with Real-World Experience

The QRG was developed by practitioners with direct experience in responding to MVIs. These contributors represent a range of roles across policing and public safety and navigated the operational demands and human impact of these events firsthand. Their collective experience informs every section of the guide, ensuring it reflects real-world conditions rather than theoretical scenarios.

The sections of the guide were developed to ensure that essential responsibilities are clearly identified and actionable, even when stress levels are high and time is limited.

How It Works

The QRG is a foundational resource for public safety agencies, providing initial considerations and a framework for agencies to refer to during and after an MVI. The QRG is composed of multiple role-based sections; each focused on a specific responsibility or role that plays a critical part in a coordinated MVI response.

The following sections are included in the QRG:

1.Things the Chief Can and Cannot Delegate

2.Logistics

3.Initial Response and Scene Management

4.Public Information Officer

5.Law Enforcement and Elected Official Liaison

6.Victim Services

7.Wellness and Psychological Services

8.Trauma Responders

Each section outlines priority tasks, recommended actions, and essential considerations related to that function. The format is intentionally concise to allow personnel to efficiently reference information in situations where detailed manuals are not practical. For supplemental information related to each role and responsibility, a list of further resources is included within the QRG.

A Whole Agency Resource

While each section can be used independently by the individual assigned to that responsibility, the QRG is designed as a unified resource. MVIs require coordination across an entire agency, and the QRG is structured to reinforce that shared effort.

Agencies may consider incorporating the guide into training, preparedness planning, and exercises. The QRG can also be made readily accessible for use during an actual incident. Agencies are encouraged to tailor the resource and its sections to align with existing policies, procedures, and jurisdictional requirements.

The QRG and its sections are intended to support decision-making and coordination. They are not meant to supersede established agency policies or protocols.

Moving Forward with Preparation and Support

No agency anticipates experiencing an MVI, but every agency can take steps to prepare. MVAI and the QRG provide police leaders, professional staff, and agency personnel with practical tools grounded in lived experience.

By leveraging these resources, agencies can reduce confusion, enhance coordination, and support the safety and wellness of their personnel and communities. When seconds count and decisions matter most, preparation and shared knowledge make a difference.

For additional information or to connect with the MVAI project team, please contact MVAI@theIACP.org.d

Please cite as

Claire Michaud, “Prepare, Respond, Recover,” IACP@Work, Police Chief 93, no. 8 (August 2026): 70–71.