Boy do I know the feeling of going back to the same stuff time and time again.
I have been on that same dizzy merry-go-round too and I am gonna need a motion-sickness pill soon!
This is my logic:
The key to this second sketch seems to point back to where the perp was most likely sighted, which is the abandoned building. JMO
To the best of my understanding, only one person saw the perp, and I personally don't think it was on the trail that he was seen.
I believe that anyone who saw someone on the trail that they thought was the suspect contributed to the person in sketch number one.
It wouldn't make sense (to me) that the perp was the one hitchhiking, as he would need to keep a low profile...so my conclusion is that the hitchiker saw the perp and the car. "They were on to something early on."
Again...JMO....LE needs someone else to validate the hitchikers story about the car before they close in on making an arrest.
They know who it is.
JMO