If RA was aware he'd been recorded/photographed, I don't think he'd have left her phone behind.
I DO think he tried to get out ahead of suspicion -- because he knew he'd been seen by the group of juveniles. His cover story seems to be, was there, walked to the bridge, walked back, sat on a bench, left, never saw the girls, so whatever happened, happened after that....
But it was a bad admission from the start because he put himself in the park when the crime happened.
What he DIDN'T account for is being seen on the platform at a fixed time, being recorded on the bridge at a specific time and being seen walking toward his car at a specific time, creating the brackets around the crime.
Unaware of those eye witnesses, IMO RA figured no one would know WHEN the crime occurred therefore his protected alibi was solid -- didn't see the girls. Left long before they were murdered.
He certainly didn't anticipate being recorded abducting him. Huge problem. Because NOW the crime started WHILE he was there, where he said he was and he's caught in a lie for having said he hadn't seen them. Why lie? We know why.
If he wants to say that's not him in the video, then how did he not see the other guy? How did he not see the girls?
If it IS him, well, here we are. He brandished a weapon, he forced them against their will, and both girls were murdered.
So far, he hasn't said HE was forced to abduct them and handed them off to the real murderer.
He hasn't said he had a psychotic break.
Nope, he gave a careful admission which made him look favorable, honest, credible with little to add -- except for the lead on the group of juveniles "for possible follow-up", a group that ultimately added -- not detracted -- from his own probable cause and culpability!
He tried. He lied. He later said he left at 1:30. But he can't substantiate it.
He can't get off the bridge at 2:13.
JMO