Security upgrades for St. Mary's County schools in year since deadly shooting

It's been one year since a gunman took the life of a 16-year-old girl at Great Mills high school in St. Mary's county. In the year since the shooting a lot of security changes have been implemented at schools in Saint Mary's County.
Published: 8:28 PM EDT March 20, 2019
Updated: 8:27 PM EDT March 20, 2019