Amaral didn't discredit her. Jane did it herself - she cannot remember passing Gerry/Jez but she can remember seeing the man crossing at the top. We've got first hand witness accounts being confused by her recollections. How she thought she brushed past two on a pavement without being seen nor heard is simply not believable.
At some point she translated the statement of one of the ladies who belonged to the group and that she describes as a brunette one. This lady said to the GNR elements, and she (the witness) translated, that she had seen a man on the road who might have carried a child.
This situation surprised her because she (the witness) was convinced that when the lady saw the man, the lady was in a place from where she had no angle of vision for the place where she saw the man. She doesn't know exactly what was the position of the lady when she saw the man, but she knows that the lady said she saw the man in the street in front of the Madeleine's bedroom window, walking in the direction of the street that then leads to the Baptista supermarket.
http://www.mccannpjfiles.co.uk/PJ/SILVIA_BATISTA.htmAt that moment a female individual, he does not know whether she was a member of the group of friends, who was in the neighbouring apartment, said that she saw an individual carrying a child, running, and that because of the pyjamas she was wearing it could have been Madeleine. It was in these circumstances that abduction began to be talked about. He made a report about this situation and sent it to the police.
This sighting did not seem to him to be very credible, because when he asked her about the physical characteristics of the individual, she said it was very dark, however she saw the pyjamas clearly.
http://www.mccannpjfiles.co.uk/PJ/NELSON-DA-COSTA.htm
