Seems to me, that this gentleman is an important witness, for example, he appeared to have walked along the pavement on the roadside part of apartment 5A where the door and the shuttered bedroom window behind which the three McCann siblings had been sleeping! Did he notice whether or not the steel shutter of that bedroom window was open or not? If it was, did he notice that the window was open? And if the window was open, did he notice whether or not the curtains were open? Failing that, was the door of 5A closed, or open?
It also must be the case, that the gentleman in question, turned his head and his body slightly to his right upon entering the road junction to make sure that there were no oncoming vehicles, or pedestrians - he wouldn't have simply walked out into that road junction like a zombie without any concern for the safety of the child he was carrying, or himself! He would have surely seen Jane Tanner walking uphill towards his position on one side of the road, and Gerry McCann and Jez Wilkins with a pushchair on the other side of the street...