On Monday afternoon, a gunman opened fire at a grocery store in Boulder, killing 10 people, including 51-year-old veteran police officer Eric Talley, who was the first to report to the scene.Ī senior law enforcement officer with the Boulder police told CNN that the weapon used was an AR-15-style rifle, the same type of weapon used in the 2018 Parkland, Florida, school shooting and the Colorado theater shooting in 2012. Of the last 80 mass shootings in the United States, more than a quarter, including Monday's shooting in Boulder, Colorado, involved the use of AR-15 rifles.Ī Newsweek analysis found that the semi-automatic rifle was used in 21 mass shootings over the past decade.Īmong those incidents are some of the deadliest mass shootings in the nation's history, including the Las Vegas shooting, which left 59 people dead the Orlando, Florida, nightclub shooting, which killed 50 and the Sandy Hook Elementary School shooting in Connecticut, which killed 28.
