The Saturday shooting rampage in Tucson that felled Congresswoman Gabrielle Giffords and 19 others, six of whom died, wasn't the first such mass-killing spree in Arizona.
Listed below are other Arizona mass shootings, dating back to a 1966 massacre inside a Mesa beauty school.
*August 28, 2010 -- After shooting six people in Lake Havasu City, five of whom died, 27-year-old Brian Diez committed suicide in California in an alleged custody battle over his two children.
*August 21, 2010 -- Twenty-seven people were arrested after five people were injured during a gunfight between two biker gangs in Chino Valley. Police estimated at least 50 rounds of ammunition had been fired during the fight.
*May 25, 2009 -- Police allege 37-year-old Brent Matthew Banks began shooting people out of jealousy at a high-school-graduation party in Mesa, killing two and injuring six.
*October 28, 2002 -- Robert Flores Jr., 41, shot and killed three professors at the University of Arizona, where he was failing out of the nursing school, before committing suicide.
*September 15, 2001 - In the aftermath of the September 11 attacks, Frank Silva Roque, 42, shot and killed a gas station owner, falsely believing he was Muslim. He then drove to another gas station, firing at a Lebanese-American clerk, but missed. Roque then drove to his former house, which had been purchased by an Afghan family, and shot several rounds into the dwelling. He was sentenced to death for the lone murder in 2003, which was commuted to a life sentence without parole in 2006.
*April 29, 2000 -- Richard Glassel, 61, began shooting at people during a homeowner's association meeting in Peoria, killing two and injuring three others. Glassel was sentenced to death in 2003.
*March 5, 1992 -- Pete Rogovich robbed a grocery store, shooting and killing a clerk. He then shot and killed three more people during a rampage at a nearby trailer park. Afterward, Rogovich took a car at gunpoint and robbed another store, before being arrested. He was sentenced to death in 1995.
*August 10, 1991 -- Six Thai Buddhist monks and three other people were killed after they were shot execution-style in a West Valley Buddhist temple near Luke Air Force Base. Four Tucson men arrested by the Maricopa County sheriff's deputies in connection with the shooting were found to be coerced into confessing to the killings, and investigators from the Sheriff's Office eventually found two new suspects, 17-year-old Alex Garcia and 18-year-old Johnathan Doody, who were both sentenced to multiple life prison sentences. Doody's conviction was overturned by a federal court of appeals in 2008, which cited that sheriff's detectives had forced a confession out of him.
*February 13, 1987 -- After getting caught with beer at the Orme School, a prep school in Mayer, 17-year-old Jarod Huskey went on a shooting spree on the school's campus, injuring two employees of the school before being shot to death by police.
*November 13, 1966 -- Robert Benjamin Smith,18, shot and killed five females at the Rose-Mar College of Beauty in Mesa. Among them were three teenagers and one 3-year-old girl. Smith was convicted of the murders in 1967, and was sentenced to two 99-year and four life terms.