I previously posted this in Loy Evitts' threat, wondering if there's a connection, now sharing here:
Rosie disappeared after leaving Truman Med Center -Hospital Hill location in KC- and Loy's purse was found a few minutes from (formerly named) Truman Med Center East (TMC East) in Lee's Summit (now renamed University Health Lakewood Medical Center.)
If there really is a connection between the two cases, the abductor could have had an affiliation with TMC. Perhaps he was an employee or he delivered supplies or repaired equipment where he was familiar with both locations? He could have followed Rosie after she was discharged. Maybe a year earlier, he was on his lunch break and randomly saw Loy that day? It would at least place him in that particular area of KC.
It would also explain how he would know the remote area where TMC East was, not far from where Loy's purse was discarded. I still think that whoever dumped Loy's purse out there, either knew the area or at the very least, knew that it was isolated. Not much was out there back then, aside from the hospital.