Law enforcement and safety experts generally recommend the protocol for active shooter situations in public spaces like Walmart:

: A disgruntled employee killed two coworkers and wounded a police officer.

: If you cannot escape, find a place to hide where the shooter is less likely to find you. Lock and blockade doors, silence your cell phone, and remain quiet.

: A mass shooting motivated by hate and racism targeting the Latino community left 23 people dead . The shooter was sentenced to 90 consecutive life terms in federal prison.

: Have an escape route and plan in mind. Leave your belongings behind and keep your hands visible for law enforcement.

: As a last resort, and only when your life is in imminent danger, attempt to disrupt or incapacitate the shooter by using physical aggression and improvised weapons.

: An overnight manager opened fire in an employee break room, killing six coworkers before taking his own life. The gunman had legally purchased the 9mm handgun hours before the attack and left a "death note" on his phone citing workplace grievances.

: A gunman entered the store and killed three people in a random act of violence. Immediate Response and Safety (Run, Hide, Fight)