I have no idea what you're trying to say here.
Ok, free will, in the case of the murderers of ZaZa, you would say they made a free will choice.
Either/Or they were determined by all the factors in a chain of cause and effect
So either they had a choice or they didn't.
That is simple.
However, all the choices they made led to the end result
which means all the free will decisions became the determining factor, the cause and effect
So you have no free will because by the time that chain of decisions
joining the gang
learning to kill
getting prepped up
and getting in those truck all loaded up
That is the chain of events, case and effect
So they did not have Free Will even though at any point supposedly they had a choice (limited each time by the previous decision)
It is not free will Or determinism
All those decisions create circumstances wherein the choices are limted to the conditions within those circumstances.
So, there is neither free will or cause and effect.
There is some other factor involved.