I agree, modesty blaise. Something happened during their captivity...was it something spiritual, even, that convicted them during this crime? Did the girls start praying? (Remember the little boy who was kidnapped and started singing a favorite gospel song in the back seat until his captor stopped the car and told him to get out? )
Also...at first we were told they'd been dropped off at a home in Richville, and escaped. But the fact that there are only two crime scenes (their vegetable stand area and the home of the perps) rules out another home being in the picture. So I think the later version (that they were dropped off by their captors--the version at the press conference)--must be the accurate one.
We do not know there was only one crime scene, though. I don't think LE has mentioned (correct me if I"m wrong) the entire timeline of when they were gone. The stand, the house, their car are all crime scenes. We don't know if they stopped anywhere else, though.