What do these infamous mass murderers have in common? Psychologist astrologer Noel Eastwood takes you into the dark, inner world of the mass murderer to discover what makes them different to the rest of humanity. The four psychopaths responsible for the horrendous mass murders at: Columbine High School massacre (Eric Harris and Dylan Klebold), Sandy Hook Elementary School shooting (Adam Lanza) and Port Arthur massacre (Martin Bryant) are examined in detail. Interestingly their charts highlight specific astrological constellations pointing to certain personality traits that suggest psychopathy. The author illustrates how to locate these psychopathic significators and the triggers that led up to their terrible acts of violence.