On October 25, 2021, 26-year-old Jo Acker, a White/Caucasian security guard at Boise Towne Square mall, was killed after confronting an active shooter on the mall’s first floor near a department store. The shooter, identified as 27-year-old Jacob Bergquist of Boise, was dressed in black and armed with multiple firearms and fired numerous rounds inside the mall.

After shooting Acker, the gunman continued and fatally wounded 49-year-old Roberto Padilla Arguelles and wounded four other people, including a police officer. Responding officers later located the shooter; an exchange of gunfire left a Boise police officer and a woman in her car injured. The shooter was shot, taken to a hospital, and died the following day.

Investigators recovered 18 spent shell casings inside the mall. Bergquist had prior contacts with law enforcement for disruptive conduct and trespassing at the mall; although he was a convicted felon who appears to have been prohibited from possessing firearms under federal law, that prohibited status was not determined by the Bureau of Alcohol, Tobacco, Firearms and Explosives until after the shootings.

If anyone was at the mall that afternoon or knew Jo Acker, please share what was seen or any information that could help explain what happened.