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A serial killer is a person who murders two or more people in separate events, usually for abnormal psychological gratification, thrill-seeking, attention, or financial gain. The FBI differentiates serial killing from mass murder or spree killing by the presence of a cooling-off period between victims. For this reason, mass murderers, such as school shooters and suicide bombers, are not included under the umbrella of serial killers. Serial murders are further defined as those committed by one or two individuals, excluding instances where groups are responsible for deaths.
Serial killings are rare, accounting for less than 1% of total homicides. In the United States, serial killing was at its highest in the period between 1970 and 2000, when 70% of recorded serial murders occurred. Rates of serial killings have been on the decline since the 1990s.
While serial killers are not solely a U.S. phenomenon, the majority of serial killers on record have operated at least in part in the United States. Serial murderers tend to be lone, white males.
Most serial killers kill for financial gain or enjoyment, with 32% on record stating they killed for financial gain and a quarter claiming to have killed for pleasure. Anger is cited as the primary motivator for another 18% of serial murders, and gang activity accounts for 6%.
Serial killers often have a preferred killing method and victim type. Ted Bundy, for example, targeted attractive, college-aged females and used strangulation as his primary method of killing. Shooting is the most common killing method among serial killers, followed by strangulation and stabbing. Serial killer victims are evenly split between males and females, and the median age of victims is 30.
State | Total Victims 1992-2019 |
---|---|
California | 1,777 |
Texas | 984 |
Florida | 933 |
Illinois | 680 |
New York | 677 |
Ohio | 505 |
Pennsylvania | 462 |
Michigan | 425 |
Georgia | 409 |
Washington | 396 |
The United States had more serial killers than any other country. A total of 12,236 victims of serial killings were registered nationwide between 1990 and 2020. California has the highest number of serial killings with 1,777 total, followed by Texas with 984. However, due to varied population sizes, these totals do not reflect the states where serial killing is most common. Washington DC has the highest rate of serial killings, with 25 victims per 100,000 residents. Alaska has the second-highest rate at 7 per 100,000; Louisiana comes in third with 6.5 serial killings per 100,000.
All 50 states have had a notorious serial killer, such as Florida's Ted Bundy, Illinois's John Wayne Gacy, and New Jersey's Charles Edmund Cullen.
State | Total Victims 1992-2019 | Most Known Killer | Most Known (# of Victims) | Most Known Status |
---|---|---|---|---|
California | 1,777 | "The Zodiac Killer" | 37 | Never found |
Texas | 984 | Genene Jones “The Angel of Death" | 2-60 | Serving life in prison |
Florida | 933 | Daniel Harold Rolling "Gainesville Ripper" | 8 | Executed |
Illinois | 680 | John Wayne Gacy | 33 | Executed |
New York | 677 | David Richard Berkowitz "Son of Sam" | 6 | Serving 6 life sentances |
Ohio | 505 | Shawn Michael Grate | 5 | Scheduled to be executed in 2025 |
Pennsylvania | 462 | Harvey Miguel Robinson | 3 | On death row |
Michigan | 425 | Benjamin Atkins | 11 | Died in prison |
Georgia | 409 | Paul John Knowles "The Casanova Killer" | 18 -35 | Killed on arrest |
Washington | 396 | Gary Leon Ridgway "The Green River Killer" | 49-90 | Serving life in prison |
Missouri | 350 | Charles Ray Hatcher | 16 | Suicide in prison |
Indiana | 349 | Herbert Richard Baumeister | 11 -23 | Suicide |
Louisiana | 344 | Samuel Little "The Choke-and-Stroke Killer" | 60-93 | Died in prison |
North Carolina | 295 | Henry Louis Wallace "The Taco Bell Strangler" | 11 | On death row |
Virginia | 272 | Alfredo Rolando Prieto | 9 | Executed |
New Jersey | 232 | Richard Francis Cottingham "The Torso Killer" | 19 -100 | Serving life in prison |
Maryland | 213 | Joseph Roy Metheny | 5-13 | Died in prison |
Kentucky | 212 | Robert Franklin Smallwood Jr. | 3 | Serving life in prison |
Tennessee | 208 | Paul Dennis Reid "The Fast Food Killer" | 7 | Died in prison awaiting execution |
Massachusetts | 200 | The Boston Strangler | 13 | Albert DeSalvo was a main suspect, but was killed while in prison for other crimes |
Oklahoma | 200 | Roger Dale Stafford | 9-34 | Executed |
Alabama | 199 | Thomas Whisenhan | 4-8 | Executed |
South Carolina | 198 | Donald Henry Gaskins "Pee Wee Gaskins" | 12-100 | Executed |
Arizona | 188 | Mark Goudeau "Baseline Killer" | 9 | Serving 9 life sentances |
Kansas | 181 | Dennis Rader "The BTK Killer" | 10 | Serving life in prison |
Oregon | 175 | Randall Woodfield "I-5 Killer" | 18-44 | Serving life in prison plus 165 years |
Colorado | 161 | Scott Lee Kimball | 4-10 | Serving 70 years imprisonment |
Arkansas | 143 | Kenneth Williams | 4-8 | Executed |
Connecticut | 134 | Michael Bruce Ross | 8 | Executed |
Wisconsin | 118 | Jeffrey Lionel Dahmer "Milwaukee Cannibal" | 17 | Killed in prison |
Nevada | 117 | Tony Ray Amati | 3-6 | Serving life in prison |
Mississippi | 98 | Glen Edward Rogers | 3-6 | Death sentence currently under appeal |
Utah | 86 | Arthur Gary Bishop | 5 | Executed |
Nebraska | 82 | Charles Raymond Starkweather | 11 | Executed |
Minnesota | 81 | Paul Michael Stephani "Weepy-Voiced Killer" | 3 | Died in prison |
New Mexico | 72 | David Parker Ray "Toy-Box Killer" | 60 | Died in prison |
Alaska | 64 | Robert Hansen "“Butcher Baker" | 17 | Died in prison |
Iowa | 53 | Gayno Gilbert Smith | 6 | Died in prison |
Montana | 47 | Wayne Nance "Missoula Mauler" | 6 | Shot and killed while committing a home invasion |
Idaho | 45 | Joseph Edward Duncan III | 5-7 | Died in prison |
West Virginia | 43 | Harry Powers "The West Virginia Bluebeard" | 5 | Executed |
Maine | 35 | John Joseph Joubert IV "The Nebraska Boy Snatcher" | 3 | Executed |
Wyoming | 32 | Rodney Alcala "Dating Game Killer" | 8-130 | Died in prison awaiting execution |
Rhode Island | 25 | Jeffrey Mailhot "The Rhode Island Ripper" | 3 | Serving life in prison |
Delaware | 16 | Steven Brian Pennell "The Route 40 Killer" | 2-5 | Executed |
New Hampshire | 14 | Terry Peder Rasmussen "The Chameleon Killer" | 6-12 | Died in prison |
Hawaii | 13 | The Honolulu Strangler | 5 | Never found |
North Dakota | 13 | Eugene Butler | 6 | Died in asylum, two years before his crimes were discovered |
Vermont | 11 | Ted Bundy | 30 | Executed |
South Dakota | 10 | William Kunnecke "Human Monster" | 3 | Escaped from prison in 1919 |