Rollins was later pronounced dead at a local hospital. That tally includes suicides and incidents when no one was injured, as well as the January shooting in which a 15-year-old gunman killed two fellow students at a Benton, Kentucky, high school.
Sen. Chris Van Hollen, D-Maryland, also released a statement saying "My heart is with the students, parents, teachers, and the entire St. Mary's community".
"DFC [Deputy First Class] Gaskill fired at the shooter ... nearly simultaneously as the shooter fired", Cameron said.
Gov. Larry Hogan, a Republican, announced the legislation February 28 after the school shooting in Florida. "Please pray for us".
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"We recently had a protest about school violence last week, and now this has happened", said Kameron Norwood, 16, as he and other students waited for relatives to pick them up from a nearby high school.
"These students are literally just not taking "no" for an answer", Cardin said.
Before today there had been 16 confirmed school shootings in the USA so far this year, according to CNN. "I do always feel safe, though, because they always have police at the school".
The gunfire erupted shortly before 8 a.m. (1200 GMT) at Great Mills High School, about 70 miles (110 km) south of Washington, county Sheriff Timothy Cameron said. A gun was taken to school, and discharged, and (in this case) somebody died and two people were wounded.
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State police say the safety officer fired one round at hit the gunman. The school has a four-year graduation rate of 91%, according to the school's 2015-16 improvement plan.
Emma Gonzalez, a senior at Stoneman Douglas High School who survived last month's shootings, wrote on Twitter, "We are here for you, students of Great Mills, together we can stop this from ever happening again".
Great Mills High School was placed on lockdown following the shooting and students were later evacuated from the school.
Federal Bureau of Investigation agents are on the scene of a shooting at a high school in southern Maryland. Headlines like this should not have to be typed up every week. An armed school resource officer fired his weapon at the shooter, who later died. "We can not allow the cries of survivors and students to be drowned out by the gun lobby", he said. "Great Mills is a wonderful school and somewhere I am proud to go". "I've never heard people sound so scared". In the 2018 Maryland Swimming Junior Championships, which took place earlier this month, she swam best times in the 50, 100, and 200 freestyle events.
"Although our pain remains fresh and the facts remain uncertain, today's disgusting events should not be an excuse to pause our conversation about school safety". He said it's now for Congress to take action. He was branded a coward by USA president Donald Trump.
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