American flags, part of a makeshift memorial, stand near the site of a 2019 shooting in Virginia Beach, Va. (AP)

VOA Special Report

Workplace shootings

Mass shootings (1966 - February 2020)

The first workplace mass shooting of the modern era took place in 1967 at a paper mill in Lock Haven, Pennsylvania.

Mass shootings are defined by the Congressional Research Service as four or more victims.

By the 1990s, the number of workplace shootings had increased significantly, to 16. During that decade, shootings occurred at a Xerox office building in Honolulu, Hawaii, a Radisson Hotel in Tampa, Florida, and two day trading firms in Atlanta, Georgia.

One of the more common locations for a workplace shooting was a U.S. post office. The first mass shooting there took place in 1986, when an employee in Edmond, Oklahoma, shot 20 co-workers, killing 14 of them. In 1991, five workers were killed at a post office in Royal Oak, Michigan, by a co-worker who had been fired.

On May 6, 1993, two post office shootings occurred a few hours apart, in Dearborn, Michigan, and Dana Point, California. Though these incidents did not fit the Congressional Research Service’s definition of a mass shooting, they inspired a new slang for workplace shootings. By the end of the year, “going postal” had entered the public’s vocabulary.

Military facilities have also become a common site of workplace shootings. In 1994, a mass shooting at Fairchild Air Force Base in Washington state killed four people. A shooting at Fort Hood, near Killeen, Texas, in 2009 left 13 unarmed soldiers and civilians dead. In 2013, an attack at the Navy Yard in Washington, D.C., killed 12.

Workplace mass shooting locations Fatalities and workplace mass shootings

Circles scaled according to the number of fatalities.

Jillian Peterson, Ph.D., and James Densley, Ph.D., built a new database of mass shooters that they hope will inform future research and policy decisions about how to effectively prevent and respond to mass shootings.

For their study, they used the Congressional Research Service’s definition of a mass shooting:

“a multiple homicide incident in which four or more victims are murdered with firearms — not including the offender(s) — within one event, and at least some of the murders occurred in a public location or locations in close geographical proximity (e.g., a workplace, school, restaurant, or other public settings), and the murders are not attributable to any other underlying criminal activity or commonplace circumstance (armed robbery, criminal competition, insurance fraud, argument, or romantic triangle).”

About the data

All shooters have either been charged, convicted or killed at the scene.

The team collected more than 100 pieces of information on each of 172 mass shooters, resulting in The Violence Project Database of Mass Shootings in the United States, 1966 - February 2020.

They compiled details on hundreds of factors, including age, race, gender, nationality, sexual orientation, religion, education, relationship status, number of children, employment type and status, military service and branch, criminal, violence and abuse history, gang and terrorist affiliation, bullying, home environment and trauma.

What emerged were fleshed-out profiles and motivations of individual shooters, whose crimes can potentially influence current, and future policy and prevention.

Workplace shootings (1966 - February 2020)

While there is no single profile of a mass shooter, there are several similar characteristics of shooters who commit crimes where they work.

According to The Violence Project database, a workplace shooter was a male in his 40s of any race. He was a blue-collar worker and had trouble at work. He used handguns and assault rifles that he legally owned.

Almost all workplace shooters have employment troubles (77%). While many are motivated to carry out their shooting at least in part by anger over workplace issues, some recent high-profile shootings have been carried out in the name of terrorism, including the attacks at a San Bernardino County, California, office party in 2015, and the Fort Hood, Texas, military base in 2009.

Nearly all workplace shooters showed signs of crisis (75%), or a marked change in behavior, often triggered by a job dismissal. Such signs include failing to comply with directives, exaggerated emotional responses, and increased interest in violence or weapons.

Sixty percent of workplace shooters had mental health concerns; 23% had been abused as children or witnessed abuse; and 49% had carried out their crime with weapons they had legally purchased.

Forty percent of workplace shooters were white, while 51% were minorities. The average age of workplace shooters was 38.5, much higher than shooters who carried out killings at schools (18) or in restaurants or bars (33).

Number of shooters by age

Years old

Workplace shooting victims

Oct. 23, 1967 Allen E. Barrett Jr. (44 years old) • Richard Davenport (32) • Donald V. Walden (31) • Carmen H. Edwards (62) • Elmer Weaver (37) • Floyd Quiggle (27) Sept. 23, 1970 Sandra L Peters (24 years old) • Patricia Chromik (22) • Linda D. Willis (21) • Mary Ann Reinisch (27) June 21, 1972 Joseph Boyd (48 years old) • Robert Bartone (22) • Joseph A. DePalma (44) • Theodore G Hall (38) • Charles Merkel (38) • Stephen B. Robinson (42) Feb. 14, 1977 Joseph Hicks (60 years old) • Frederick Holmes (55) • James Green (45) • Pariyarathu Varghese (32) • Allen McLeod (33) June 17, 1978 Robert Lee (51 years old) • John O’Dell (40) • Danny Linn (48) • Dorothy Johnston (38) • Cecila G. Bagity (66) Aug. 9, 1982 Dave Bahl (28 years old) • Wyvonne Kohler (45) • Martin Douglas Moran (30) • Moody Charles Smith (58) • Richard Svoboda (37) • Eddie Eugene Ulrich (40) Feb. 3, 1983 Christine Leacock (25 years old) • Jacob Zimmer (61) • Unidentified male (20) • Unidentified female (12) March 16, 1985 Donald Abbott (48 years old) • John Coligan (31) • Paul Edward Gabelt (52) • Ralph Tomaro (52) Aug. 20, 1986 Patricia Ann Chambers (41 years old) • Judy Stephens Denney (39) • Richard Charles “Rick” Esser, Jr. (38) • Patricia Ann Gabbard (47) • Jonna Gragert Hamilton (30) • Patty Jean Husband (49) • William F. Miller (30) • Kenneth W. Morey (49) • Betty Ann Jarred (34) • Leroy Orrin Phillips (42) • Jerry Ralph Pyle Jr (51) • Paul Michael Rockne (33) • Thomas Wade Shader Jr. (31) • Patti Lou Welch (27) Feb. 16, 1988 Ronald Doney (36 years old) • Lawrence J. Kane (46) • Helen Lamparter (49) • Glenda Moritz (27) • Ronald Steven Reed (26) • Joseph Lawrence Silva (43) • Wayne “Buddy” Williams Jr. (23) Sept. 14, 1989 Richard “Dickie” Barger (54 years old) • Kenneth Fentress (45) • James G. “Buck” Husband (47) • Sharon Needy (49) • William “Bill” Ganote (46) • Paul Sallee (60) • James Wible (56) • Lloyd White (42) • Unidentified person Oct. 10, 1991 Cornelius Kasten Jr. • Donald McNaught (63) • Carol Ott (30) • Joseph M. VanderPaauw (59) Nov. 14, 1991 Mary Ellen Benincasa (32 years old) • Christopher Louis Carlisle (33) • Keith Cszewski (37) • Rose Marie Proos (33) July 1, 1993 Allen J. Berk (52 years old) • Jack Berman (36) • Deborah Fogel (33) • Donald Michael Merrill (48) • Shirley Mooser (64) • John C. Scully (28) • Jody Sposato (30) • David Sutcliffe (30) Dec. 2, 1993 Richard M. Bateman (65 years old) • James Edward O’Brien (35) • Anna F. Velasco (42) • Richard Villegas (43) Dec. 14, 1993 Sylvia Crowell (19 years old) • Benjamin Grant (17) • Margaret Kohlberg (50) • Colleen O’Connor (17) June 20, 1994 Thomas Brigham (31 years old) • Alan London (40) • Christine McCaren (8) • Anita Linder (62) April 3, 1995 Wendy P. Gilmore (41 years old) • Derek Harrison (35) • Joann Rossler (62) • Walter Charles Rossler (62) • Richard Tomlinson (34) July 19, 1995 Neil Carpenter (61 years old) • Anthony J. Gain (78) • James Walton (60) • Marty Wakefield (57) Feb. 9, 1996 Joseph Belotto (40 years old) • Kenneth A. Brunjes (46) • Mark A. Bretz (36) • Joseph Timothy Clifford (37) • Donald Leroy Moon Jr. (44) April 24, 1996 Stanley Adams (45 years old) • Dwight Craft (48) • Merideth Moree (49) • Rick Robbins (47) • Glenda Tornes (42) Aug. 19, 1997 Vickie Marie Bunnell (45 years old) • Dennis Joos (51) • Leslie G. Lord (45) • Scott E. Phillips (32) Sept. 15, 1997 Ernest Leonard Filyaw Jr. (31 years old) • Charles Griffeth (56) • David Moore (30) • Esther Sheryl Wood (27) Dec. 3, 1997 Frank Dosso (35 years old) • George Gonsalves (69) • Diane Dosso Patisso (28) • George Patisso Jr. (27) Dec. 18, 1997 Hal Bruce Bierlein (51 years old) • Wayne Allen Bowers (43) • Michael James Kelley (49) • Paul White (40) March 6, 1998 Otho R. Brown (54 years old) • Michael T. Logan (33) • Linda A. Blogoslawski Mlynarczyk (38) • Frederick W. Rubelmann III (40) July 27, 1999 Leigh Ann Vandiver Barton (27 years old) • Matthew David Barton (11) • Mychelle Elizabeth Barton (8) • Russell J. Brown (42) • Dean Delawalla (52) • Joseph J. Dessert (60) • Kevin Middleton Dial (38) • Jamshid Havash (45) • Vadewattee Muralidhara (44) • Edward Quinn (58) • Allen Charles Tenenbaum (48) • Scott Allyn Webb (30) Nov. 2, 1999 Jason Balatico (33 years old) • Ford Kanehira (41) • Ronald Kataoka (50) • Ronald Kawamae (54) • Melvin Lee (58) • Peter Mark (46) • John Sakamoto (36) Dec. 30, 1999 Jose Aguilar (40 years old) • Barbara Carter (55) • George Jones (43) • Eric Pedroso (29) • Dolores Perdomo (56) March 20, 2000 Roberto Jimenez Jr. (15 years old) • Dennis Lee (48) • Augustin Villasenor (36) • Benjamin Villasenor (32) • Rhoda Wheeler (46) Dec. 26, 2000 Jennifer Bragg Capobianco (29 years old) • Janice Hagerty (46) • Louis Javelle (58) • Rose M. Manfredi (48) • Paul Marceau (36) • Cheryl Troy (50) • Craig Wood (29) Feb. 5, 2001 Michael Victor Brus (48 years old) • Daniel Thomas Dorsch (52) • William Allen Garcia (44) • Robert Edward Wehrheim (47) Sept. 8, 2001 George Bernardino (48 years old) • John Derek Glimstad (19) • Marsha Marie Jackson (32) • Nina Susu (20) • Nikolay Popovich (28) March 22, 2002 Dave Arpasi (73 years old) • John Contadeluci (47) • Robert Downs Jr. (42) • Craig Schafer (51) Feb. 25, 2003 Benjamin Ferguson (47 years old) • Billy Wayne Knox Sr. (61) • Billy Eugene Knox Jr. (22) • David Seiler (46) July 8, 2003 DeLois Bailey (53 years old) • Sam Cockrell (46) • Micky Fitzgerald (45) • Lynette McCall (47) • Charlie J. Miller (58) • Thomas Willis (57) Aug. 27, 2003 Calvin Ramsey (44 years old) • Robert Taylor (53) • Juan Valles (34) • Alan Earl Weiner (50) • Daniel Weiner (30) • Howard Weiner (59) July 2, 2004 Ardell L. Edwards (55 years old) • Lonnie Ellenberg (46) • Jose Ibarra (45) • Travis Lamont Nelson (23) • Leonardo Rodriguez (49) Jan. 30, 2006 Ze Vang Fairchild (37 years old) • Beverly Ann Graham (54) • Nicola Michelle Grant (42) • Maleka M. Higgins (28) • Dexter E. Shannon (57) • Guadalupe Swartz (52) • Charlotte Colton (44) March 18, 2008 Golden “Dave” Duboise (45 years old) • Ricardo Cardenas Leal (33) • Robert Louis Leeds (66) • Terry Edward Majan (38) June 25, 2008 Joshua Hinojosa (28 years old) • Trisha Mirelez (25) • Israel Monroy (29) • Kevin G. Taylor (30) • Rachael Vasquez (26) Nov. 5, 2009 Michael Grant Cahill (62 years old) • Libardo Eduardo Caraveo (52) • Justin Michael DeCrow (32) • John P. Gaffaney (56) • Frederick Greene (29) • Jason Dean Hunt (22) • Amy Sue Krueger (29) • Aaron Thomas Nemelka (19) • Michael S. Pearson (22) • Russell Gilbert Seager (51) • Francheska Velez (21) • Juanita L. Warman (55) • Kham See Xiong (23) Aug. 3, 2010 William Carl Ackerman (51 years old) • Bryan Cirigliano (51) • Francis Fazio Jr. (57) • Louis J. Felder (50) • Victor James (59) • Edwin Kennison Jr. (49) • Craig Peppin (60) • Douglas A. Scruton (56) Sept. 27, 2012 Keith Basinski (50 years old) • Jacob Beneke (34) • Rami Cooks (62) • Ronald Edberg (58) • Reuven Rahamim (61) • Eric Rivers (42) Sept. 16, 2013 Michael Arnold (59 years old) • Martin Bodrog (54) • Arthur Daniels (51) • Sylvia Frasier (53) • Kathy Gaarde (62) • John Roger Johnson (73) • Mary Francis Knight (51) • Frank Kohler (50) • Vishnu Shalchendia Pandit (61) • Kenneth Bernard Proctor (46) • Gerald L. Read (58) • Richard Michael Ridgell (52) Dec. 2, 2015 Robert Adams (40 years old) • Robert Adams (40) • Isaac Amanios (60) • Isaac Amanios (60) • Bennetta Betbadal (46) • Bennetta Betbadal (46) • Harry Bowman (46) • Harry Bowman (46) • Sierra Clayborn (27) • Sierra Clayborn (27) • Juan Espinoza (50) • Juan Espinoza (50) • Aurora Luz Godoy (26) • Aurora Luz Godoy (26) • Shannon Johnson (45) • Shannon Johnson (45) • Larry Daniel Kaufman (42) • Larry Daniel Kaufman (42) • Damian Meins (58) • Damian Meins (58) • Tin Nguyen (31) • Tin Nguyen (31) • Nicholas Thalasinos (52) • Nicholas Thalasinos (52) • Yvette Velasco (27) • Yvette Velasco (27) • Michael Raymond Wetzel (37) • Michael Raymond Wetzel (37) June 5, 2017 Kevin Clark (53 years old) • Kevin Lawson (46) • Brenda Montanez-Crespo (44) • Jeffrey Roberts (57) • Robert Snyder (69) June 28, 2018 Gerald Fischman (61 years old) • Rob Hiaasen (59) • John McNamara (56) • Rebecca Smith (34) • Wendi Winters (65) Sept. 12, 2018 Petra Maribel Bolanos de Casarez (45 years old) • Eliseo Garcia Cazares (57) • Manuel Contreras (50) • Laura Garcia (31) • Antonio Valadez (50) Feb. 15, 2019 Russell Beyer (47 years old) • Clayton Parks (32) • Vicente Juarez (54) • Josh Pinkard (37) • Trevor Wehner (21) May 31, 2019 LaQuita Chenoah Brown (39 years old) • Ryan Keith Cox (50) • Tara Welch Gallagher (39) • Mary Louise Crutsinger Gayle (65) • Alexander Mikhail Gusev (35) • Joshua Orion Hardy (52) • Michelle Marie “Missy” Langer (60) • Richard H. Nettleton (65) • Katherine Anne Marie Lusich-Nixon (42) • Christopher Kelly Rapp (54) • Herbert Ray “Bert” Snelling (57) • Robert Thomas “Bobby” Williams Sr. (72) Feb. 26, 2020 Jesus Valle Jr. (33 years old) • Gennady Levshetz (61) • Trevor Wetselaar (33) • Dana Walk (57) • Dale Hudson (60)

* Includes victims who died as a result of the shooting, in some cases decades later due to injuries suffered at the scene.