The MythNo. 01
An IQ of 145 turned himself in.
Santa Cruz, California · 1972–1973
The Myth3 cases4 myths
The genius, the loner, the man who cannot stop. The record says otherwise.
The short answer
The FBI’s 2008 report on serial murder names seven myths and answers each: that serial killers are all dysfunctional loners, are all white males, are only motivated by sex, all travel and operate interstate, cannot stop killing, are all insane or are geniuses, and want to get caught.123
Stat · The Myth
| Measure | Value | Kind | Note |
|---|---|---|---|
| Male | 90.8% | Count | |
| White | 52.5% | Count | |
| White, male, mid-to-late twenties | 12.2% | Count |
The FBI lists the genius serial killer as a myth. Radford figures put the median IQ at 86 to 89. Edmund Kemper confessed. Gary Ridgway stayed free 19 years.
The FBI lists the belief that serial killers cannot stop killing as a myth. Its two examples went 14 and 11 years without a known killing before capture.
The FBI calls it a myth that serial killers want to get caught. They come to feel they cannot be. Dennis Rader asked police if a floppy disk was traceable.
The FBI says most serial killers are not reclusive misfits. Gary Ridgway painted trucks for 32 years. Dennis Rader was president of his church congregation.
The argument
The list comes from the FBI. Its Behavioral Analysis Unit-2 planned a symposium on serial murder, held in San Antonio, Texas, in 2005. The report that grew out of it, published in 2008, lists seven “common myths and misconceptions regarding serial murder” and answers each one.1234
The report says the FBI “hosted a multi-disciplinary Symposium in San Antonio, Texas, on August 29, 2005 through September 2, 2005.”1 “A total of 135 subject matter experts attended the five-day event,” it says.1
The FBI’s announcement of the report began: “On television and the silver screen, serial killers are usually white males and dysfunctional loners who really want to get caught.”3 It said that, according to the new report, “serial killers are much different in real life.”3
The first heading reads: “Myth: Serial killers are all dysfunctional loners.”1 The report answers: “The majority of serial killers are not reclusive, social misfits who live alone.”1 It adds: “Serial murderers often have families and homes, are gainfully employed, and appear to be normal members of the community.”1
Wendy Lee Coffield, 16, was found dead in the Green River near Kent on July 15, 1982.56 Gary Ridgway pleaded guilty to 48 counts of aggravated first-degree murder in 2003 and to a 49th murder in 2011.567 The report lists him among its examples: he “was employed as a truck painter for thirty-two years.”1
The second heading reads: “Myth: Serial killers are all white males.”1 The report answers: “Contrary to popular belief, serial killers span all racial groups.”1 In the Radford/FGCU Serial Killer Database’s 2016 statistics, 90.8% of U.S. serial killers across all decades are male and 52.5% are white.4 The commonly cited profile, a white male in his mid to late twenties, fits 12.2%.4
The third heading reads: “Myth: Serial killers are only motivated by sex.”1 The report answers: “All serial murders are not sexually-based. There are many other motivations for serial murders including anger, thrill, financial gain, and attention seeking.”1 In the Radford/FGCU database’s 2016 table of motives for U.S. serial killers, enjoyment (thrill, lust, power) accounts for 31.76%, financial gain for 30.14% and anger for 18.07%.4
The fourth heading reads: “Myth: All serial murderers travel and operate interstate.”1 The report answers: “Most serial killers have very defined geographic areas of operation.”1 It adds: “Very few serial murderers travel interstate to kill.”1
Yes. The FBI report says: “There are, however, some serial killers who stop murdering altogether before being caught.” Janelle Cruz, 18, was killed in Irvine, California, on May 5, 1986. Joseph DeAngelo, who pleaded guilty to 13 murders in 2020, was identified in 2018, more than three decades after his last victim.18910
The fifth heading reads: “Myth: Serial killers cannot stop killing.”1 The report answers: “There are, however, some serial killers who stop murdering altogether before being caught.”1 It names what can inhibit them: “increased participation in family activities, sexual substitution, and other diversions.”1
Dolores Davis was the last of ten people killed in and around Wichita, Kansas, from 1974 to 1991.11112 The report’s first example is Dennis Rader, who “murdered ten victims from 1974 to 1991” and “did not kill any other victims prior to being captured in 2005.”1
Janelle Cruz, 18, was killed in her home in Irvine, California, on May 5, 1986.89 Joseph DeAngelo pleaded guilty to 13 counts of first-degree murder on June 29, 2020, and prosecutors list hers among the murders he admitted.910 Genetic genealogy had identified him in 2018, more than three decades after his last victim.910
The sixth heading, paraphrased here, names the myth that all serial killers are insane or are geniuses.1 The report restates it: “Another myth that exists is that serial killers have either a debilitating mental condition, or they are extremely clever and intelligent.”1
On the first half, the report says: “Most, however, are not adjudicated as insane under the law.”1 On the second: “Like other populations, however, serial killers range in intelligence from borderline to above average levels.”1 The Radford/FGCU database’s September 2016 report gives a median IQ of 86.0 and an average of 94.5 for 271 serial killers.4
The seventh heading reads: “Myth: Serial killers want to get caught.”1 The report answers: “As serial killers continue to offend without being captured, they can become empowered, feeling they will never be identified.”1 It ends: “It is not that serial killers want to get caught; they feel that they can’t get caught.”1
Before sending a floppy disk, Dennis Rader asked police whether it would be traced to a particular computer.1213 The disk was traced to his church, and he was arrested on February 25, 2005.1213
The rule
Rarity, anecdote and fiction made these myths. The FBI’s report answers all seven.
The record
FBI, Behavioral Analysis Unit-2, National Center for the Analysis of Violent Crime, “Serial Murder: Multi-Disciplinary Perspectives for Investigators,” ed. Robert J. Morton, co-ed. Mark A. Hilts (FBI, 2008), copy published on govinfo.gov: editors (p. iii); the 2005 symposium (Foreword, p. vii); serial murder rare, and where the myths come from (pp. 2 to 3); the seven myth headings and the report’s answer to each (pp. 3 to 6); the definition (p. 9)
Office of Justice Programs, NCJRS Virtual Library, abstract record for “Serial Murder: Multi-Disciplinary Perspectives for Investigators,” NCJ Number 223848 (U.S. Department of Justice, undated record): editor; date published 2008; the definition the symposium crafted; the seven myths, in the report’s order
FBI, “Serial Murder: New Report Highlights Views of Experts,” FBI news story (July 7, 2008), Internet Archive copy of archives.fbi.gov: the report announced as a new publication; serial killers as shown on screen
M. G. Aamodt, “Serial Killer Statistics” (Radford University/FGCU Serial Killer Database, September 4, 2016): the FBI definition (p. 1); “A Problem With The Typical Profile,” U.S. serial killers, All Decades column (p. 10); Broad Motives, % US column (p. 11); Serial Killer IQ (p. 12)
Seattle Times staff, “Timeline of the Green River killer case” (The Seattle Times, February 18, 2011): Wendy Coffield, 16, found July 15, 1982; plea to 48 counts, November 5, 2003; plea to Rebecca Marrero’s murder, February 18, 2011
King County Sheriff’s Office, “Green River homicides investigation” (King County, undated page): Wendy Lee Coffield found July 15, 1982; plea to 48 counts, November 5, 2003
Associated Press, “’Green River Killer’ pleads guilty to 49th murder” (published by NBC News, February 18, 2011): the plea to a 49th murder
City of Irvine, “Serial Killer Linked to Two Irvine Homicides Arrested in Northern California,” news release (April 25, 2018): Janelle Cruz, 18, killed in her Irvine home on May 5, 1986
Orange County District Attorney, “Joseph James DeAngelo Jr. Pleads Guilty to 13 Murders, 13 Kidnappings and Dozens of Additional Uncharged Crimes,” press release, case no. 18FE008017 (June 29, 2020): the plea; the murders he admitted, Janelle Cruz’s among them; identified through genetic genealogy in 2018
Janelle Griffith, “Golden State Killer suspect pleads guilty to 13 counts of first-degree murder” (NBC News, June 29, 2020): the plea; arrest in April 2018; genetic genealogy; murders from 1975 to 1986
Associated Press, “Fast Facts: BTK Victims” (published by Fox News, August 18, 2005): the ten victims, from January 1974 to January 1991, the last of them Dolores Davis
Tim Potter and Stan Finger, Knight Ridder Newspapers, “Police detail capture of BTK” (Lawrence Journal-World, July 10, 2005): Dolores Davis his final victim, killed January 19, 1991; his question to police about sending files on diskettes; the diskette traced to his church; arrest on February 25
Mark Hansen, “How the Cops Caught BTK” (ABA Journal, May 1, 2006): his question to police about a floppy disk; the disk traced to his church; arrest February 25, 2005
Educational analysis. Adjudicated cases only. Victims named with respect.