Self explanatory, the link was made by the papers,Rob quoted as much,Redwood made no mention of a name.
On the presumption that there must still be DVD'S out there containing information we have not seen, the explanation for an investigative journalist getting hold of an individual's details is easily understood.
Paulo Reis "found" Dr Totman and published his name on his blog in 2009 in relation to quite another conspiracy theory all together.
DCI Redwood had this to say about him on the BBC Crimewatch programme:
SnipOne of the things that we picked up very quickly was the fact that there was a night crèche that was operating from the main Ocean Club reception, and 8 families had left eleven children in there and one particular family we spoke to gave us information that was really interesting and exciting. In fact I would say it was a, it was a revelation moment when having discussed with them what they were doing on the night they themselves believed that they could be the Tanner sighting.
http://www.gerrymccannsblogs.co.uk/Crimewatch.htmAny enterprising journalist with that information to hand had only to discover
(a) who the eight families were who left their children in the night creche that evening
(b) which of those eight families had a child around Madeleine's age
(c) where those families were housed in relation to apartment 5A
In fact it is such a logical and simple thing to do if seeking information of any kind relating to investigating and gathering evidence when a child goes missing I'm surprised no-one in the PJ thought about doing so at the time.
That they didn't, seems to be borne out by the fact that according to DCI Redwood, " ... one particular family we spoke to ... " suggesting that Scotland Yard had to track and interview the eight families a few years down the line to find out if they knew anything.
Which in fact one of them did and at that time according to the DCI " ... when having discussed with them what they were doing on the night they themselves believed that they could be the Tanner sighting".
It also answers the question as to why the Totmans did not contact anyone with their information between May 2007 and being contacted by SY years down the line ... they just did not know it might might have been relevant.
It wasn't their job to work it out though was it?
It was a police job and it was the police who made the connection years down the line ... unfortunately not the ones with boots on the ground in 2007.