A police vehicle is parked in front of Great Mills High School in Great Mills, Md., after a shooting at the school about 70 miles south of Washington. March 20, 2018 A police vehicle is parked in front of Great Mills High School in Great Mills, Md., after a shooting at the school about 70 miles south of Washington. Melina Mara/The Washington PostTwo students were critically injured and the gunman died at Great Mills High School in Southern Maryland. Blaine Gaskill, the St. Mary’s County sheriff’s deputy assigned to Great Mills High School, was the school resource officer who engaged the shooter. The National Association of School Resource Officers has about 4,500 members, but the organization estimates that there could be anywhere from 14,000 to 20,000 school resource officers across the country.

Source: Washington Post March 20, 2018 18:05 UTC