Very interesting, indeed. It also fits with many other studies I've read about. Some key parts in it...
" When the child is between the ages of 5 and 12, the suspect is most often male, a close friend or a stranger, sexually compulsive, killing using means such as strangling."
"Analysis of 621 cases representing 44 states across the USA showed that in 44% of the cases the victim was deceased within one hour post abduction. Within three hours, 74% of victims were dead."
" They report studies which conclude in the majority of cases (72%), the radius from body recovery site to murder scene is less than 200 feet. The distribution was different when it came to journey from the initial contact setting to the murder site: 31% travelled 0-199 feet, whereas 43% trekked 1.5-12 miles."
"... the killers are usually at the initial contact site for legitimate reasons. They either lived in the area or were engaging in some routine. She also reports most child abduction murders are opportunistic. Only in 14 percent of cases was the victim picked out because of some physical characteristic. The initial contact site is within 1/4 mile of the victim's last known location in 80% of cases."
"In fact, US data suggests well over half of abductions that led to murder took place within three city blocks of the victim's home and approximately one-third within one-half block."
"Heide, Beauregard and Myers describe a personality profile of a typical extra-familial perpetrator - shy, anxious, reserved, feeling inferior; taking refuge in fantasy, where they become omnipotent and powerful. But the more they take flight into the imagination, the more real it becomes. This imaginary world gets so familiar, it's inevitably enacted.
As a result of this secret inner world, family, neighbours, and friends never guess who is capable of such a crime."
Hm...