What if RP did indeed meet FA at the shed behind the school, but a woman (white shirt/blonde hair/bundled on top of head/plump) took WT from FA, drove with him in the back seat and passed witness RC's home. Who the man is, wearing a cowboy hat (in a car??), who drove behind the woman, I don't know yet. RP perhaps met with FA behind the school and drove another way to a certain meeting point, where the woman would have been waiting. It hasn't to be 100% true, what RP said to police. If it was the truth for 80/90%, it would be fine enough. Maybe, RP didn't want to include the woman for unknown purposes. Speculation only and MOO.
Does it make sense?