IMO, it would take a truly cool-headed individual to do this, especially if it was the body of a friend, not someone a perp murdered (in my scenario, anyhow).
I've recently thought a POI might have disposed of LS in an area that resembled an area that was familiar yet not close to home, i.e., in a lake near Martinsville if he was from an area with lakes, etc. This makes sense to me intuitively. But ...
I initially believed LS would be found in the landfill ... that a POI put her in a dumpster and got lucky. I still wonder why dogs supposedly hit on a dumpster. I've also wondered if a POI started to and then got scared, thus leaving a scent. There was a case in Traverse City, MI, near the time of LS', where a young woman's body was moved from one place to another. But Traverse City isn't downtown Bloomington. But ...
If an out of towner did drive LS from one state to another ... and that person was DB, I have another thought. His family's real estate company buys up foreclosing apartment/condo complexes, I believe. Those also have dumpsters ... again, going with what's familiar. Who would think to look for LS in a MI landfill?
Do I believe this happened? No ... but a truly cool-headed individual might be able to pull something like this off. Personally, I believe she's closer. But ...