First responders take part in active shooter training

Police officers take part in active shooter training conducted by Advanced Law Enforcement Rapid Response Training: Center in Maxwell, Texas on Feb. 14, 2018.

A police officer works to clear a room as he takes part in active shooter training conducted by Advanced Law Enforcement Rapid Response Training: Center in Maxwell, Texas on Feb. 14, 2018.

Police officers work to treat victims as they take part in an active shooter training scenario conducted by Advanced Law Enforcement Rapid Response Training: Center in Maxwell, Texas on Feb. 14, 2018.

Police officers and medical personnel work to evacuate victims as they take part in active shooter training conducted by Advanced Law Enforcement Rapid Response Training: Center in Maxwell, Texas on Feb. 14, 2018.

Police officers take part in active shooter training conducted by Advanced Law Enforcement Rapid Response Training: Center in Maxwell, Texas on Feb. 14, 2018.

Police officers clear a hallway as they take part in active shooter training conducted by Advanced Law Enforcement Rapid Response Training: Center in Maxwell, Texas on Feb. 14, 2018.

Bear County Sheriff Deputy James Maddock radios in a casualty collection point as he takes part in active shooter training conducted by Advanced Law Enforcement Rapid Response Training: Center in Maxwell, Texas on Feb. 14, 2018.

Mmedical personnel work to evacuate victims as they take part in active shooter training conducted by Advanced Law Enforcement Rapid Response Training: Center in Maxwell, Texas on Feb. 14, 2018.