Why an 1980s Psychological Evaluation Missed Psychopathic Traits in a Suspected Killer

A high-profile investigation in Philadelphia involving a home tied to multiple missing women has brought renewed attention to how mental health professionals assess psychopathy and evaluate individuals within the criminal justice system. Law enforcement officials and the FBI have investigated the property shared by Eugene Horsch and his late father, Raymond R.C. Horsch, who died in 2025 at the age of 82 and is suspected by police of multiple homicides. Eugene Horsch has not been charged with any homicides or missing-person offenses related to the investigation.

The ongoing case has raised broader questions about serial killers and whether forensic psychologists can identify individuals at risk of escalating toward extreme violence. Forensic experts note that early identification of psychopathic characteristics can potentially help courts and treatment providers intervene before antisocial behavior escalates. However, previous psychological records show that an evaluation of Raymond Horsch conducted in the mid-1980s did not identify him as a potential psychopath. According to forensic specialists, the primary reason for this omission is that reliable, standardized assessment tools for psychopathy simply were not available at that time.

Understanding Psychopathy and Clinical Diagnostics

Psychopathic personality disorder, commonly known as psychopathy, is not an officially recognized diagnosis in the current version of the American Psychiatric Association’s Diagnostic and Statistical Manual of Mental Disorders (DSM), which serves as the primary diagnostic resource for mental health professionals in the United States. Although early versions of the manual included concepts related to psychopathy, more recent editions eliminated the specific diagnosis due to ongoing challenges in reliably assessing emotional traits such as shallow affect and lack of remorse.

Instead, the DSM includes a diagnosis for antisocial personality disorder, which primarily emphasizes observable behavioral patterns rather than core interpersonal and emotional characteristics. Researchers generally view psychopathy as a more extreme variant of antisocial personality disorder. While absent from the DSM, psychopathy has been extensively studied for decades and is characterized by specific traits:

• Pathological lying and extreme narcissism
• Impulsivity and a persistent pattern of manipulative behavior
• Lack of empathy, remorse, and shallow affect

While certain traits associated with extreme psychopathy are frequently found among notable serial killers, mental health experts emphasize that most individuals with psychopathic characteristics are not serial killers and can be found across various professions, including corporate and legal fields.

The Evolution of Assessment Tools

Mental health professionals frequently conduct evaluations for the criminal justice system to help courts determine matters such as competency to stand trial, sentencing, or insanity defenses. Identifying psychopathic characteristics can influence sentencing decisions because individuals scoring higher on specialized measures often present a statistically higher risk for future criminal behavior.

One of the most widely utilized assessment tools, the Psychopathy Checklist-Revised (PCL-R), has been heavily researched over the past few decades. Studies indicate that the PCL-R can reliably identify psychopathic characteristics in clinical and research settings, helping gauge future risk. However, this critical tool was not commercially released until 1991.

When Raymond Horsch underwent a federal psychological evaluation in 1985 following a conviction for counterfeiting and methamphetamine manufacturing, the evaluating psychologist described him as grandiose, mistrustful, suspicious, excessively controlling, and consumed by anger. The evaluation diagnosed him with bipolar disorder and paranoid personality disorder. While the report noted several traits associated with psychopathy, formal identification was impossible because the standardized diagnostic instruments used today had not yet been developed or released.

Recent Research and Forensic Applications

Decades of subsequent research have expanded the scientific understanding of psychopathy, examining everything from courtroom use of psychological evidence to underlying neurological structures. Studies using neuroimaging have found that specific brain regions associated with thrill-seeking and impulsive behavior tend to be larger in individuals with psychopathic characteristics, whereas regions linked to emotional regulation and fear processing appear smaller.

Researchers caution that while forensic evaluations can highlight increased risk, most psychological assessments in the criminal justice system occur only after an individual has already been arrested or convicted. Experts suggest that identifying these traits during evaluations for less serious offenses or early antisocial behaviors remains a vital area of study for improving intervention strategies before violence occurs.