By following his intuition and questioning a three year old boy Martin Beck discovers that the man who killed the children used a tube to get their and as a result his location can be narrowed down.
The problem is that there are few witnesses but the one that they are working with from the mugger sticks in Beck’s brain. He keeps replaying the description and realises that it tallies word for word with one he overheard being made by a colleague when he talked to a woman about a man on the balcony.
Although it is going to be like a needle in a haystack, and several colleagues think it is a waste of time, Beck starts to focus the search on the man on the balcony before he can kill again.
Last chunk tomorrow…