Very interesting points. I also believed all the sightings, the phone call, the letter was not really the girls. It makes the most sense that they were killed shortly after they were taken. Whatever became of Rachel's husband & her sister during the investigation? Thomas Trlica & her sister Debra were engaged right before he married Rachel. At the time of the trio's disappearance, Debra was temporarily living with them. Debra & Thomas claim living all together was not awkward...but I really wonder about that. Apparently, family members of Julie, Rachel & Lisa also wonder this as well. All believe that Rachel's sister knows more then she is saying. They wrote a letter in 2000 of January begging her to divulge all the information she knows. I have always been curious as to if they are still persons of interest after all this time? After all, they were the last ones to see the girls, knew were they were going, the girls would have easily trusted them & there is potential motive. Not saying it's what happened...I just wonder....
Charley Project has more of the details on ths:
http://www.charleyproject.org/cases/t/trlica_mary.html