Female mass shooters are an infrequent occurrence.

How rare? More than 98% of mass shootings have been committed by men, according to The Violence Project. This nonpartisan research group tracks U.S. mass shooting data dating back more than a half-century. 

On Monday, a 28-year-old gunman opened fire and fatally shot three students and three staff members at a small private Christian elementary school in Nashville, authorities said. Police identified the attacker as Audrey Elizabeth Hale, 28, a transgender man who was assigned female at birth.

“The shooting today is a stark reminder that mass shootings are not exclusive to men,”  The Violence Project, a nonprofit, said in a statement. “However, if we look specifically at K-12 school shooting cases in our database, the perpetrators were 100% male. Most were current or former students of the schools they targeted.” 

When have women shooters killed before?

It was initially thought that Hale was the first female school shooter who has killed four or more people, the project said Monday, although it said there have been instances of women and girls firing guns at schools before. This includes a shooting at Grover Cleveland Elementary School in San Diego in 1979.

Since 2013, there have been 101 incidents where there was a female shooter out of 4,025 mass shootings, said Mark Bryant, executive director of the Gun Violence Archive.

One notable mass shooting involving a female suspect occurred in San Bernardino, California, in 2015 that left 14 people dead and nearly two dozen wounded. 

How many shootings are there in the US in 2023?

Monday’s incident in Nashville is the 130th mass shooting in the United States in 2023, according to the Gun Violence Archive. The archive defines a mass shooting as one in which at least four people are shot, excluding the shooter.

The United States is currently ahead of last year’s pace, which saw the 100th mass shooting on March 19, 2022, the archive reports.