Twenty-three mass killings have taken place in the past year since the Aurora, Colo. movie theater shooting, according to a USA Today report.
According to USA Today, 126 people have been killed in mass killings across 19 states since July 20, 2012. The analysis used the FBI's definition of mass killings as those in which four or more people were killed in a short time span. The list was not limited to shootings.
Six of the attacks, the newspaper reported, were "public killings in which many of the victims were unknown to their killers" -- including the Newtown, Conn. elementary school massacre, the Boston Marathon bombings, and the Santa Monica College shooter.
The USA Today analysis showed that the 17 other mass killings were mostly family slayings or robbery- or drug-related murders, in which victims typically know their killers. Public killings like Aurora and Newtown that draw national attention are thus "anomalies," USA Today found.