This RB is very interesting to me. If he is indeed the perpetrator, for his age he is highly sophisticated and organized in certain respects. He managed an abduction in broad daylight without being noticed, secreted the victim to a preselected location, committed rape and murder right there at the scene within yards of numerous other people, and then disposed of the body under the noses of neighbors, and perhaps even LE, then turned up within hours to help with the search acting as if nothing at all was amiss. That points to a very organized and sophisticated killer. I wouldn't expect to see that in a 20 year old young man with no criminal history and seemingly normal previous life.
If GBI indeed has a large body of evidence linking RB to this crime, I think that while he was organized and sophisticated he was also inexperienced in completely covering his tracks. I think this was his first crime of this magnitude and if he really is the right suspect he is an incredibly and awesomely dangerous person. One of the most dangerous I've come across in a while. This is the material that the Ted Bundys and Jeffrey Dahmers are made of, and with a little more experience RB (if he really is the guy) could have gotten away with this kind of thing for years, if not decades.
I'd love to interview him from a forensic perspective. Pure sociopaths do not come along very often (thank God). They should be studied from every angle.