A gunman fired shots in the stairwell of Ascension Saint Thomas Midtown Hospital on Saturday. Metro Nashville Police Department officers took into custody Nicholas Perre Zaayenga and found a firearm and multiple magazines onsite. Zaayenga had entered a stairwell through a back door. 

Brink Fidler, president of Defend Systems, a local active shooter training provider, said calls from hospitals for his services have been on the rise.