For sure I think he did horrible things to those girls. Yes the phone stopped moving at a certain time, but that could have just been the time they had to get undressed.Speculation: KA said she and Rick always did their own thing. Reading WAY between the lines, I wonder if their bedroom was long cooled.... one might wonder, given his mental health crises, if he had performance issues, further cementing for KA that he wouldn't do such a thing, because maybe he couldn't ...
Ricky said he thought the girls were older, didn't R them... in order to make himself not guilty of that, as if it somehow exonerates him. He forced them to undress. That is a sexual assault. He was alone with them for another 14 minutes before crossing the creek. 14 minutes is a long time. He took panties and a sock as trophies. He's right -- he didn't R them. (And no one did, something only the perpetrator could know.) But that doesn't mean he didn't further SA them.
For all we know, he had really low performance self esteem, wanted to be laughed at, humiliated (it's a thing), tied up. He may have a variety of fetishes which fulfill "sensually motivated crime". Yoyeurism, exhibition, feet. He smoked a cigarette.
He is remarkably silent about those 14 minutes. What he didn't do (R) doesn't account for any of those long minutes. It must have been awful because he's not saying.
JMO
He also said he thought they could have been as young as 11.