Had they any clue, or 103 would the whole thing remain in the category of undiscovered crimes? 
Did they seriously think it would remain under wraps?
They didn't think it would remain undiscovered, in fact they knew it would get uncovered.
The man is running over the bridge.
Where the Bargello Museum is now, people used to be kept locked up and suffering.
there is a kid playing with a ball of  red colour around the four bare trees
An old man is throwing rocks at trains
It sounds like you're already equipped to be a general contractor.
A man is tackling another man.