As I said I would look at the Archiving Report (
http://www.mccannpjfiles.co.uk/PJ/LEGAL_SUMMARY.htm) to see if there was a hint the PJ knew who Smithman was.
Two paragraphs sums it up:
"Martin Smith was questioned, who said that at the beginning of the Travessa da Escola Primária he saw an individual carrying a child, walking in the opposite direction, at a normal pace, when he passed this individual it must have been about 22.00, being totally unaware that a child had disappeared. Later he states that when he saw Gerald McCann on the news, leaving by plane, he appeared to him to be the individual whom he had seen on the night of 3rd May in Praia da Luz.
This witness was heard again by the Drogheda Irish police on 23-01-08, having been shown a video clip of Gerald McCann’s departure by plane carrying one of the twins. This witness maintains his belief that judging by the posture, there seemed to be a probability of 60-80% that the person seen by him at about 21.55 at the previously mentioned place, was Madeleine’s father. At this time, Gerald’s presence at the restaurant was confirmed by his friends and has not been denied by restaurant employees."
It clearly doesn't say the identity of the Smithman is known to the PJ. Yet they claim there are no more leads to followup. Catch 22 there, they could have kept hunting the identity of Smithman.
The case should not have been archived.