See our timeline since 1999 HERE.
December 11, 2012. On Tuesday, 22-year-old Jacob Tyler Roberts killed 2 people and himself with a stolen rifle in Clackamas Town Center, Oregon. His motive is unknown.
September 27, 2012. Five were shot to death by 36-year-old Andrew Engeldinger at Accent Signage Systems in Minneapolis, MN. Three others were wounded. Engeldinger went on a rampage after losing his job, ultimately killing himself.
August 5, 2012. Six Sikh temple members were killed when 40-year-old US Army veteran Wade Michael Page opened fire in a gurdara in Oak Creek, Wisconsin. Four others were injured, and Page killed himself.
July 20, 2012. During the midnight premiere of The Dark Knight Rises in Aurora, CO, 24-year-old James Holmes killed 12 people and wounded 58. Holmes was arrested outside the theater.
May 29, 2012. Ian Stawicki opened fire on Cafe Racer Espresso in Seattle, WA, killing 5 and himself after a citywide manhunt.
April 6, 2012. Jake England, 19, and Alvin Watts, 32, shot 5 black men in Tulsa, Oklahoma, in racially motivated shooting spree. Three died.
April 2, 2012. A former student, 43-year-old One L. Goh killed 7 people at Oikos University, a Korean Christian college in Oakland, CA. The shooting was the sixth-deadliest school massacre in the US and the deadliest attack on a school since the 2007 Virginia Tech massacre.