I haven't been on the thread for quite awhile. It defies logic with a photo, voice recording, and (hopefully) some DNA that the Perp has yet to be charged.
I was doing a little research, and came across an interesting study on serial killers, and thought others of you might find this interesting too.
PDF you can download:
https://www.preprints.org/manuscript/201801.0010/v1/download
Some highlights:
• Victims were mostly females (75.4%) and their ages ranged from 8 to 91 years.
• All (100%) of the serial killers were males.
• The average educational level for killers was a high school certificate or further education (70.2%).
• "The high education level reflects the intelligence level of these offenders". P.14
• 32.6% of killers were diagnosed by a psychiatric disorder.
• The relationships between the killers and the victims were mostly a customer and client relationship with (41.5%), then comes strangers (31.5%), acquaintances (12.1%), and finally targeted strangers with (11.7%) percentage.
• Number of victims in the scene ranged from 2 to 23 victims with 2 to 4 victims as the largest group with (60.9%), then 5 to 9 victims with (27.2%), and 10 or more with (12%) percentages.
• The motives for the killers were mostly for sex (81.5%)