You bring up a good point. Did RA have his phone on him, turned on, while he was murdering the two girls? Perhaps this will be additional evidence that will be revealed in the next hearing...JMO
My speculation
This was a planned abduction.
Phone turned off.
Burner/shared phone for tracking.
3 young people saw him.
The lady saw him.
We know Libby and Abby saw him.
He wasn't worried about Abby and Libby identifying him, he had a terminal plan for that IMO.
I think he dismissed the young people.
I think the lady was a problem. I do think he made sure she was committed to leaving so he could proceed, but I think their encounter was mutually recorded. By which I mean-- I think they locked eyes.
I personally think he was on the bridge, for the vantage point (watching for his planned arrival, also taking a census of parkgoers) and I believe he was on the phone. On A phone.
Which IMO is why he copped early to being on the bridge, on a phone. He knew he'd been seen, knew he couldn't walk that back.
Moo he was on a phone not associated with himself ....
If he gave his contact info the the CO, IMO he gave his cellphone #, the cellphone IMO he didn't have with him that day. He was hardly hoomh to provide his burner number! (Again, it's MY speculation that he was using a different phone that day, one synced with Libby's (or Abby's), without her knowledge.
Later, if LE did a tower dump, guess what number wouldn't show up! RA's. That phone was probably watching TV at his house.
And IMO just like that, LE might've moved Top RA into the 'unfounded' pile. Based on his cellphone number, he wasn't there at the time of the crime. Probably figured he was mistaken about the time he was there, therefore had no info to add to the search.
I suspect we will learn at trial that there was, however, A phone number in use that day, one which LE was unable to pair.
While RA continued to hide in plain sight, falsely alibied by his cellphone, parked nowhere near the bridge.
Lucky break.
Hoping his luck has run our.
JMO