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Modern Wisdom1 In 6 Serial Killers Are Women, Here's Why - Dr Marissa Harrison
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At a glance
WHAT IT’S REALLY ABOUT
Unmasking Female Serial Killers: Motives, Myths, and Evolutionary Roots
- Dr. Marissa Harrison explains how female serial killers differ systematically from men: they more often kill for money and power, target familiar and vulnerable victims, and use covert means like poisoning, frequently in caregiving roles.
- She argues that cultural beliefs about women as nurturers make female serial killers both under‑suspected and under‑studied, despite estimates that roughly one in six serial killers in the U.S. are women.
- Drawing on evolutionary psychology, Harrison links male and female motives to reproductive strategies, proposing a ‘hunter–gatherer’ model where male killers stalk strangers while women ‘gather’ victims within their social and domestic circles.
- The discussion also critiques the true-crime industry’s glamorization of violence, emphasizes the impact of childhood trauma, and calls for more resources for policing and psychological intervention to prevent violence earlier in life.
IDEAS WORTH REMEMBERING
5 ideasFemale serial killers are more common than people think, but harder to detect.
Harrison cites estimates that about one in six U.S. serial killers are women; however, because they kill in quieter ways (e.g., poisoning, medical settings, family environments), their crimes often mimic natural deaths and go unnoticed longer.
Men and women kill for systematically different primary motives.
Her data show men are primarily sexually motivated, often targeting strangers, while women more often kill for money and power, usually against people they know—spouses, children, elderly relatives, or patients.
Female serial killers frequently occupy caregiving roles that grant access and cover.
Roughly 44% of the women in her U.S. sample were nurses or nurse’s aides, leveraging trust, medical knowledge, and access to drugs to harm infants, the elderly, or the disabled with low immediate suspicion.
Cultural beliefs about female nurturance create investigative blind spots.
Societal schemas of women—especially grandmothers, mothers, and nurses—as inherently caring delay suspicion, meaning female killers ‘hide in plain sight’ inside roles where death can be plausibly attributed to illness or age.
Childhood sexual and physical abuse is overrepresented among both male and female serial killers.
Harrison repeatedly finds profound childhood trauma, especially sexual abuse, in case histories; while most abused children never become violent, this trauma appears as a common denominator among those who do.
WORDS WORTH SAVING
5 quotesWe need to catch male serial killers, but we need to detect female serial killers.
— Dr. Marissa Harrison
When somebody’s convinced something is true, they dig their heels in, and even in the face of contrary evidence, they might dig in even further.
— Dr. Marissa Harrison
Women tend to kill for money and power; men tend to kill for sex.
— Dr. Marissa Harrison
If I told you the story of that boy they called Johnny, you’d feel bad for him. But that boy was John Wayne Gacy.
— Dr. Marissa Harrison
I do believe morbid curiosity informs protective vigilance.
— Dr. Marissa Harrison
High quality AI-generated summary created from speaker-labeled transcript.
