Key facts at a glance
On May 31, 2014, in Waukesha, Wisconsin, two adolescent girls lured their classmate into the woods and stabbed her nearly 20 times, each claiming they wanted to prove their devotion to the fictional online character known as Slender Man. One victim survived after emergency surgery; the other died. The case prompted widespread discussion about internet folklore, mental health, and parenting, and led to changes in how courts and mental health professionals assess youth violence and online influence.
| Attribute | Verified Detail | Source Type |
|---|---|---|
| Date | May 31, 2014 | Police reports and court records |
| Location | Waukesha, Wisconsin, United States | Local law enforcement statements |
| Victims | 1 killed; 1 survived | Autopsy and hospital reports |
| Offenders | Two female adolescents at the time of the offense | Court filings and criminal charges |
| Legal outcomes | One committed to a mental health facility; one tried as an adult and sentenced to life imprisonment | Court rulings and Wisconsin Department of Corrections |
What is Slender Man
Slender Man is a fictional supernatural entity created in 2009 as part of an online Photoshop contest. The character is typically depicted as a tall, thin figure in a black suit, often associated with creepypasta horror stories, fan art, and video games. Unlike mythological figures with centuries of oral tradition, Slender Man originated from internet culture, specifically from image boards and early social platforms. Its narrative is intentionally vague, designed to inspire user-generated stories rather than present a fixed canon. Over time, references to Slender Man spread into memes, fan fiction, and video games, carrying no medical or historical authority but significant influence on at-risk youth.
How the incident unfolded
On the day of the event, the two offenders planned to meet the victim in a park, then lead her into woodland areas near a municipal building. Each offender had researched Slender Man content online and independently decided that killing the victim would prove their loyalty to the character and their acceptance within an online group. They stabbed the victim multiple times; one offender called emergency services afterward, while the other attempted to leave the scene. Responding officers arrived quickly, provided first aid, and transported both victims to hospitals. The surviving victim underwent surgery and recovered; the deceased victim succumbed to her injuries. Legal proceedings followed, centering on whether the offenders understood the wrongfulness of their acts and how online narratives influenced their decision-making.
Investigation and legal outcomes
Initial response and charges
Law enforcement treated the case as a critical violent incident, collecting digital evidence from computers, phones, and online accounts. Prosecutors charged both offenders with severe felonies, including first-degree intentional homicide. Because one offender was a minor at the time of the offense, the court had to decide whether to try her as an adult, weighing public safety, accountability, and developmental factors. Ultimately, one offender was tried as an adult and received a sentence of life imprisonment without the possibility of parole, while the other was committed to a mental health facility after being found not guilty by reason of mental disease or defect.
Appeals, reviews, and policy impact
Both offenders and their families pursued appeals, arguing for reduced sentences based on mental health claims and the influence of online content. Higher courts largely upheld the original outcomes, noting the premeditation involved and the severity of the harm. The case spurred policy discussions about internet safety education, mental health screening for youth, and police protocols for digital evidence. Many jurisdictions updated school threat assessment procedures to include online behavior indicators, aiming to identify and intervene before plans escalate to violence.
Public reaction and cultural conversation
Media coverage initially focused on the bizarre nature of the case, with headlines emphasizing Slender Man’s role. Over time, reporting shifted toward the mental health of the offenders, the responsibilities of parents and educators, and the potential harms of violent online content. Researchers conducted interviews and studies with people affected by the case, including the surviving victim and the families of both offenders. Critics cautioned against framing Slender Man as a direct cause, noting that multiple risk factors usually contribute to youth violence. Community advocates used the case to highlight the need for open conversations about online influence, emotional distress, and access to mental health care.
Mental health considerations
Adolescent brain development and susceptibility
During adolescence, the brain regions responsible for impulse control and long-term planning are still developing, which can increase susceptibility to peer influence and risky online behavior. In this case, both offenders demonstrated intense absorption in Slender Man stories, using online forums to reinforce beliefs that violence could be justified. Experts testified that the offenders showed limited understanding of the permanent consequences of their actions, a common trait in youth with underdeveloped decision-making capacities. The case underscores the importance of monitoring online activity, teaching digital literacy, and providing accessible mental health support to help young people distinguish fiction from reality.
Treatment and prevention approaches
Following the incident, the surviving victim and some family members of the offenders participated in therapy to address trauma, guilt, and grief. Prevention efforts since 2014 have focused on early intervention in schools, parental guidance about online content, and better coordination between mental health providers and law enforcement. Evidence-based programs now encourage students to report concerning online behavior, teach critical evaluation of digital stories, and promote help-seeking for peers who show signs of distress. While no single measure can prevent complex events like this, layered approaches that combine education, mental health care, and responsible media exposure reduce risk over time.
Enduring relevance and lessons
More than a decade later, the Slender Man stabbing remains a reference point in discussions about internet safety, youth violence, and media influence. The case illustrates how fictional characters can be misinterpreted by vulnerable individuals and highlights the need for accurate information when talking about high-profile events. For adults working with young people, the takeaways include fostering open communication, setting clear boundaries around online behavior, and knowing when to seek professional help. In an evolving digital landscape, understanding the intersection of storytelling, mental health, and real-world consequences helps communities respond more effectively and reduce similar tragedies in the future.