LCSO, regional agencies complete FEMA active-shooter incident management training

By Robert Perea
03/19/2026 08:59 AM

Supervisors, deputies, SWAT operators and dispatchers from the Lyon County Sheriff’s Office joined more than 50 first responders from agencies around the county last week for a three-day Active Shooter Incident Management course at the Lyon County Fairgrounds in Yerington.

The FEMA-led ASIM Advanced training uses full-scale, simulation-based scenarios to test how law enforcement, fire, EMS, dispatch and emergency management personnel coordinate during fast-moving critical incidents. The course is certified by the National Tactical Officers’ Association as a national standard for active-shooter response.

Lt. Bret Willey said personnel from the Central Lyon, Mason Valley and Smith Valley fire protection districts, the Lyon County Office of Emergency Management, Yerington Police Department, Lyon County Juvenile Probation and Battle Born Medevac also participated.

Held inside the fairgrounds’ Big Barn, the course placed responders in high-fidelity scenarios that ran from the initial 911 call through final medical transport. Participants rotated through incident-command roles including incident commander, tactical commander, public information officer, logistics and crisis-response positions, using a shared checklist and common playbook designed to standardize decision-making across agencies.

Each scenario required deputies and supervisors to coordinate not only the initial law enforcement response but also rescue teams, paramedics, air-medevac resources and county emergency-management assets. Willey said many participants were placed in unfamiliar roles to give them a broader understanding of the responsibilities and communication demands involved in a major critical incident.

For several deputies and supervisors, it was the first time they had worked through a simulated event involving so many outside agencies.

Active-shooter and active-assailant incidents are highly complex and can shift rapidly, Willey said, making realistic, multi-agency training essential for evaluating and strengthening response plans.