At this time, there's nothing to connect the suspect to any criminal activity. We do know that the suspect knows how to abduct a woman, drive her to a remote area, assault her, murder her, successfully hide the body, and show up for work in the morning as though nothing happened. That means that there will not be a lot to work with except perhaps a DNA connection.
Israel Keyes is definitely one of the most sophisticated serial killers we've seen. He didn't have much of an education either, but he was meticulous with planning. He was also brazen, relied on blitz attack, and was merciless.