Over the years, we've attempted to catalogue the carnage nationwide in relation to shootings and slayings in Colorado. On April 20, 2009, the tenth anniversary of the attack on Columbine High School, we published "The Columbine Effect: A Horrific Roster of School Shootings Since 1999," which used data from The Brady Campaign to Prevent Gun Violence to detail 108 school shootings over the span of that decade. A 2012 update, shared after the December 2012 killings in Newtown, Connecticut, added 73 more. Then, in October 2015, following an assault on the Umpqua Community College in Roseburg, Oregon, we crunched the numbers again and documented another 81 school shootings, bringing the total to 262.
In December 2015, after shocking gun violence at a Planned Parenthood branch in Colorado Springs killed three and wounded nine, we broadened the focus of a subsequent post to mass shootings in general during that calendar year. The sum is mentioned in our headline: "351 Mass Shootings From Jan. 1 to Planned Parenthood Attack."
Calculating the mass shootings from July 2012 to yesterday is difficult simply because there have been so many of them, and definitions vary. But assorted organizations have tried their best. In the wake of Newtown, for example, the aforementioned Brady Campaign issued a document titled "Mass Shootings in the United States Since 2005" that listed fourteen such incidents after the Aurora theater slayings in 2012 in which at least three people were wounded or killed. Here's that list, in reverse chronological order:
26 people were shot and killed at Sandy Hook Elementary School, a K-4th grade school. 24-year-old Ryan Lanza, whose mother was one of the victims and employed by the school, was the lone gunman. Twenty young students and six adults at the school died.
December 11, 2012
22-year-old Jacob Roberts killed two and injured one before killing himself at a Portland-area shopping mall, which was crowded with thousands of holiday shoppers. The injured victim was a 15-year-old girl, to whom Roberts had no relation.
November 6, 2012
Lawrence Jones, a 42-year-old employee of a Fresno, CA-area chicken processing plant opened fire at his workplace, killing two and injuring two others before killing himself. Jones had a long criminal history and was on parole at the time of his death. Later reports indicated that he had been diagnosed with ‘explosive disorder.’
October 21, 2012
Two men, ages 28 and 30, were killed in a shooting that also wounded a 25-year-old pregnant woman in the city’s South Chicago neighborhood. This incident was one of many unrelated shootings that together resulted in 24 wounded in one weekend.
October 21, 2012
Radcliffe Haughton shot and killed his estranged wife Zina Haughton and two other women, wounding four others before killing himself, at the salon where she worked. Haughton had a history of harassing Zina, who had filed a restraining order against him on October 8, 2012. This order prohibited Haughton from owning any firearms, yet two days after it was approved, Haughton illegally purchased a .40-caliber semiautomatic weapon, which he used to kill three people and himself.
October 18, 2012
Three women were killed and one was wounded at a beauty salon by gunman Bradford Baumet, who later killed himself at another location. Police say he was served with a domestic violence injunction October 9, 2012, and had been scheduled to appear in court the day of the shooting.
Winter Springs, FL
September 30, 2012
Several people exchanged gunfire before a charity motorcycle ride began at a Veterans of Foreign Wars post. Shooters killed two and wounded one, and police confiscated numerous weapons.
September 27, 2012
Disgruntled former employee Andrew Engeldinger entered Accent Signage Systems, Inc., and opened fire, killing five and wounding four before killing himself. Among those killed were Reuven Rahamim, the business owner, and a UPS driver.