Because Gerry McCann is not a man in need of identification.
Madeleine's parents were on every front page in Portugal, Britain and Eire.
Similarly they were constantly being portrayed in news broadcasts and Mr Smith said they followed the news closely in the hope that Madeleine would be found.
Mr Smith was unable to give the police a description of the man he saw ... in particular ... he did not recognise the man whose image he had been exposed to seeing constantly for the fortnight before his initial contact with An Garda Síochána and the intervening period before making his statement to the PJ on the 26th May.
That makes twenty three days of unprecedented coverage showing Madeleine's father including images of him walking while carrying one of the twins.
Mr Smith did not identify Dr McCann ... a man whose image he could not fail to have seen ... as the man carrying the child.
Caption:Lagos, PORTUGAL: Kate (L) and Gerry (R) Mccann, the parents of four-year-old Madeleine McCann, carry their twins as they walk
16 May 2007 outside The Ocean Club in Praia da Luz, Lagos, in the Portuguese southern province of Algarve
http://www.gettyimages.co.uk/detail/news-photo/kate-and-gerry-mccann-the-parents-of-four-year-old-news-photo/74163358Caption:PRAIA DA LUZ, PORTUGAL: Kate (R) and Gerry (L) Mccann, the parents of four-year-old Madeleine McCann, carry their twins
17 May 2007 outside The Ocean Club in Praia da Luz, Lagos,
http://www.gettyimages.co.uk/detail/news-photo/kate-and-gerry-mccann-the-parents-of-four-year-old-news-photo/74172984**snip**
— States that it is not possible for him to recognise the individual in person or by photograph. http://www.mccannpjfiles.co.uk/PJ/MARTIN_SMITH.htm