I watched the HE with the sound on this time. I thought the psychics were pretty restrained in their predictions, so I am considering their words carefully. Mostly, they were concerned about a truck they believe was parked at BL (not the white truck, a dark 'tricked out' pickup) as well as a building that is near to locations the girls were known to be. The building would have seemed very remote at night to two girls unfamiliar with the area. But, apparently, it's not. There is a creek nearby. They believe the killer passed the girls, then deceived them into stopping so he could get into their car via threatening with a gun.
One thing their description made me think about was what if the guy had a spotlight on his truck. If he put that in J.B.'s eyes, she'd have to stop. But, the psychic think J.B. and Tracie believed there was an accident (for a few seconds). This is plausible and it'd be another way to get them to stop.
Also, the psychic felt the type of sexual assault perpetrated was making the girls partially undress and then watch what the sicko was doing to himself. The thing about this is it answers 'why J.B.?' with no, it was both of them... it's just the only person with evidence of such a horrid encounter was J.B. But, almost the same thing happened at the same time. Of course, that part will never be known for sure until the killer is caught.
This being said, the police said they would follow up on the few clues the psychics gave them. So, I guess the building yielded no evidence. I wonder if they found a truck like that? But, if it wasn't usually around, then they wouldn't be able to unless another witness recalls seeing it.
ETA
BTW, I am not saying people should have to trust the psychics. But, if the killer's truck lights momentarily blinded J.B. then she'd have to stop. This would allow him to threaten her with the gun and possibly get into her vehicle.