I thought it was an interesting story, but I prefer my WDYTYAs to be about the lifespans of people (so finding out where they were born, how they grew up, their job, marriage and death etc) rather than about a single issue.
This reminded me of the Rick Stein episode when Rick traced the mental health records of his father - I kept wondering to what extent the average person on the street would have access to these records. Are the witness statements open to all?
It is, however, a bit disappointing if the answer to the question of who and why was he shot already known as per nospringchicken's post below.