Doesn’t mean he lied necessarily.
It could be as simple as LE asked RA: “when you were out on the trail that day, did you see the three girls walking out of the area?” — a question worded like this is leading. It tells RA he should agree that he did or didn’t see three girls. If he says yes, and doesn’t include that he saw another girl with them, it can look like he lied, when he didn’t. He just agreed with what police suggested. That is much different than if he had been asked “What can you tell me about what you saw that day?” - an open ended question that isn’t a YES or NO response, and which encourages the witness to relay as much info as possible about his recollections.
How police interview witnesses can be quite damning to a case and can help lead to wrongful convictions. In this case, it is possible that it could lead to RA’s wrongful conviction (I say possible here because I want to see what the State has and hear what the D comes up with as rebuttal before I go ahead and convict him, even though I believe its likely he is guilty in whole or in part). Since I’ve not got time to cough up a link on how police interviews of witnesses can severely impact the information provided by witnesses, I’ll say MOO for now.