For the umpteenth time they were attempting to ascertain where the poor child lay.
Don't you find it strange John that neither of them could say where the body was? The only credible reason IMO is that they simply did not know - because she had been abducted. Why go through terrible torture AFTER confessing - that makes no sense at all to me. What did they have to gain that was worth being beaten half to death for once they had confessed she was dead ? One would think that once confessions had been made - full co-operation with the PJ would have been far more to their advantage.
If Joana was abducted - then all the torture in the world wouldn't change the fact that it would be impossible for them say where the body was - simply because no body existed for them to dispose of.
I'm sure lots of 'suggestions' were put forward by the PJ as to where the body was - and were all agreed to at the time, just to stop the pain.