Police in Phoenix, Arizona are using new brain scanning technology to help officers during violent encounters.
A headset uses sensors to measure brain activity. It connects to an app.
While wearing the headset, officers work through cognitive games that train their minds.The technology can detect if someone's emotional system is over-charged.
The department hopes officers will improve their critical thinking skills so they can address decisions made during violent encounters.
New recruits will start training on the headsets next week.