Pardon me for butting in here; There are several links on this thread that are broken. I grew up in this area and know that it's a scary place for women, that's why I moved away in 1988. It might be easier to find the missing by looking at the people that have been caught and charged with similar crimes. I don't even know how to put this into words, sorry.
It's simply known and everyone accepts the fact that men who do this travel in a pair. My aunts who grew up in the 1930's talked about the "pairs of men that commit crimes" as a matter fact or area knowledge, like everyone knew that's how they operated. In a pair.
In 2017 I moved back to the area (Belton, MO) to work and spend a year with my dying father. I was in the grocery store parking lot at dusk, and was approach by two men asking me for $1.00. One man was knocking on my window on the passenger side while the other one was at my drivers door. I was 50 years old at the time, not 23. I told them to shove off and took off in my car. I called the manager of the grocery store and told him about the two men approaching me and he said "Yes that happens from time to time". He was seriously not concerned about it.
My point is, it's so common knowledge that these perps travel in 2 , no one thinks twice about it.
Does anyone have a good link to historical arrest records of Jackson County, MO? Also, Lafayette County just due east of there is big haven for hide-outs of criminals. Still...