Edward Kemper, also known as the "Co-Ed Killer," is a serial killer who operated in the United States during the 1970s. He murdered ten people, including his grandparents, mother, and six young women, and engaged in acts of necrophilia and dismemberment.
The terms "primary psychopath" and "secondary psychopath" are not universally recognized or officially used diagnostic categories in the field of psychology or psychiatry. The distinction you might be referring to is between "primary psychopathy" and "secondary psychopathy," which are concepts from the Hare Psychopathy Checklist (PCL-R) developed by Canadian psychologist Robert D. Hare.
Primary psychopathy refers to individuals who have personality traits such as lack of empathy, shallow emotions, manipulativeness, and a charming demeanor. They may exhibit predatory behavior and are more likely to engage in planned and calculated violent acts.
Secondary psychopathy, on the other hand, is associated with individuals who display impulsive behavior, high levels of aggression, and are more reactive in their violent actions. They may have difficulty controlling their emotions and may have experienced a history of trauma or adverse life circumstances.
Based on the available information about Edward Kemper, he exhibits characteristics more consistent with primary psychopathy. He was known for his manipulative behavior, superficial charm, and premeditated approach to his crimes. He demonstrated a high level of intelligence and cunning, which he used to elude suspicion and capture. However, it's important to note that diagnosing individuals with mental health conditions posthumously, especially without a formal evaluation, can be challenging and should be approached with caution.