IMO this crecheman malarkey can be seen in two ways,either Tanner saw Totman and didn't get a clear enough view to recognise him,or it wasn't him.
If it wasn't him then have SY made a huge booboo,remember Redwood said that they had identified the person as being there at the exact same area and in the same time,thus enabling them (SY) to move the timeline on,just suppose as it seems some would like to suggest that there was some one else in the exact same area at the same time then SY have wasted years and £millions in missing him/her by moving onto to Smithman and then the supposed burglars.
I don't think serious investigators would have ignored either the burglaries (particularly the two in block 5) or the assaults on children without at least attempting to find some clarification.
I think any investigation which ignored accounts of men carrying a child at that time would have been remiss. It is worth bearing in mind that nothing happened as far as the Smith sighting for example was concerned throughout the months between it being reported and Mr Smith mistaken identification.
In my opinion if Dr Totman was not identified until Operation Grange identified him, that was not a failing on the part of OG but a failing on the part of the original investigation.
I truly don't get where this idea comes from that police doing their job of tracing criminals ... because in my opinion that is undoubtedly what they are doing ... and hopefully bringing wrongdoers to justice, are somehow 'wasting years' and 'wasting money' in so doing.
Maybe we should save the lot and just disband all the forces of law and order and leave the criminals free rein to get on with it? Isn't that the logical conclusion?