There is a lot of information out there on the Angela Hammond case. It seems like there was always a certain "cloud of suspicion" that hung over her boyfriend. In 2005, reports started comming out that "new evidence" was found, possibly DNA, that tended to exonerate Rush and Cheney. No arrest have been made.
There is very little information out there on the Cheryl Kenney case. From what I can tell, a skeleton was found that was believed to be her and she was removed from missing person web sites. No arrest were ever made nor or any suggestions of new evidence. A poster who claims to be her son alleges that the identification was made without DNA (apparently because of the expense). At his behest, the Missouri Highway Patrol eventually did a DNA test and the skeleton was found to be a "male".
All of this information was obtained from the Unsolved Mysteries web site and its "forum" (
Angela Hammond Girl abducted from phone booth - Sitcoms Online Message Boards). I can't verify anything on Cheryl Kenney. It seem once someone changes from a "missing person" to an "unsolved homicide", the interest on the net drops way off.
I must say that after reading the above forum, I came away with a very negative impression of Law enforcement in rural Missouri. I still feel pretty strongly that the boys from Mack Creek were involved in the other two case. Springfield, I'm not so sure. I would place them with Cox, Garrison and the rest.
Below is a link to a map of the location of the four cases.
http://maps.google.com/maps/ms?ie=U...0673367270850517029.000476664d273330c13a3&z=8