Both girls had been bound .
Both girls had been likely subjected to a sexual assault prior to the murders , and each had been wearing white ankle socks at the time of her abduction , which may have triggered a fetish in the perpetrator 's psyche .
Both girls had been bound and likely subjected to a sexual assault prior to the murders , and each had been wearing white ankle socks at the time of her abduction , which may have triggered a fetish in the perpetrator 's psyche .