Unless he was shackled, he had an opportunity to leave work. Where I worked, we used card keys to go from floor to floor. If we were going to another floor, and there were several of us, one person used the card key, and the rest of us followed through the open door. This would only prove one person was in a certain area. I don't think Ronald's company used anything this sophisticated. He was free to come and go. Obviously, he did not have much supervision, or somebody would have realized he wasn't working, just making phone calls.
