What are you using as your cite for that?
Witness testimony of Martin Smith taken 2007/05/26 with map of sightingUrged, states that when he passed this individual it would have been around 22H00
He did not notice any other relevant details partly due to the fact that the lighting was not very good.
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Adds that in May and August of 2006, he saw ROBERT MURAT in Praia da Luz bars. On one of these occasions, the first, he was inebriated and spoke to everyone. He did not wear glasses at that time. He also states that the individual who carried the child was not ROBERT. He would have recognised him immediately.
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— States that it is not possible for him to recognise the individual in person or by photograph.
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http://www.mccannpjfiles.co.uk/PJ/MARTIN_SMITH.htm