Questions regarding where BC could have taken Yingying:
1. Where would locals consider to be the most secluded and desolate areas in Urbana? Native locals would have intimate knowledge of the area (consider how well you know your home town), therefore could probably name wooded areas, lakes, train tracks, back roads that would be ideal for dumping a body without anyone finding out.
2. Did BC take any road trips during this time? It seems like too short a time frame for him to have traveled so far outside the Champaign area, and unless he had a detailed plan of where he would take her already (entirely possible as kidnap was somewhat premeditated), he wouldn't want to be driving around aimlessly for a long period of time with a body in the car.
3. Has he committed this type of crime before or is it his first time? If it is his first time, he would have been more panicked and frantic in his thinking in wanting to dispose of body. He would have picked somewhere familiar and not connected to him in an obvious way; where would be the place that would come to mind for him? Somewhere he has been once or twice in the area that seemed secluded enough that he was comfortable no one would be there. Somewhere with road access, no neighbors etc.
3. He's a guy with a small circle, he seems to frequent the same places regularly (campus, the gym, his apartment) so I doubt he would have had familiarity with the wider area of the county. Which route might he have taken to drive back home to Wisconsin? He may have been familiar with this route that could pass empty fields etc.
4. He seems like a guy committed to the fantasy world and reads a lot of books, watches a lot of movies and plays a lot of games. I wonder if any books he has read dealing with murder have planted suggestions in his head as to how to dispose of a body. He's definitely a fantasist if he thinks he can go around kidnapping girls in the middle of the afternoon.
5. If it was completely premeditated then he would have thought long and hard about where he could dispose of a body/ commit murder, making it extremely difficult to pinpoint the potential wheres as he is a smart guy. Having said this, if the crime was so detailed in its premeditation he must have written it down somewhere, maybe in code, or in a deleted document. I think his search engine history would be more rife with things.