10/08/2016 15:01 BST | Updated 10/08/2016 15:13 BST

Librarian, 73, Shot Dead By Florida Police Officer During ‘Roleplay’ Exercise

Knowlton played a victim and the officer an aggressor

A 73-year-old librarian has died after she was accidentally shot by a police officer during a “roleplay” firearms training exercise.

Mary Knowlton was “mistakenly struck with a live round” during the exercise hosted by the Punta Gorda Police Department in southwest Florida.

She had been taking part in a “shoot/ don’t shoot” scenario in which she played a victim and the officer an aggressor.

Mary Knowlton was pronounced dead shortly after the shooting on Tuesday night 

Police Chief Tom Lewis said the incident occurred on Tuesday night as Knowlton was one of two of the 35 participants randomly selected to take part in a live roleplaying scenario “in which they make decisions on using simulated lethal force.”

“I am devastated for everyone involved in this unimaginable event,” Lewis told reporters during a late-night news conference at the police department.

“If you pray, please pray for Mary’s family, and for the officers who were involved. Everyone involved in this accident is in a state of overwhelming shock and grief.”

Knowlton was taken to a hospital in nearby Fort Myers, where she was pronounced dead.

She was shot during a two-hour citizens academy which is a free, eight session course designed to provide insight into city government, according to the website.

The Florida Department of Law Enforcement is investigating, Lewis said. He declined to identify the officer involved in the shooting, but said he’s been placed on administrative leave.

A profile on a Facebook page that appeared to be Knowlton’s said she lives in Punta Gorda, but had been a librarian at Scott County Public Library in Savage, Minnesota.

She studied library science at Minnesota State University in Mankato, Minnesota, and elementary education at George Mason University in Virginia.

The profile information said she’s from Austin, Minnesota.