I'm not really a fan of telling the climax/heart of the story in the prologue or first chapter, and then the next chapter starts the life story of the protagonist. If you're going to tell the life story of the 2 MC's, I'd rather you start with that. I also take issue with the fact that there was an entire chapter dedicated just to talking about the type of gun and the type of taser that the officers carried. An entire chapter is/was not necessary.
I think that the the author did a fairly good job in giving a lot of pertinent details, showing that he did a good amount of research. I think he wanted to also come off as impartial one way or the other, but wasn't completely successful based on the statement "...it's no use pretending he was an innocent victim in all of this..." Actually, he was. Oscar Grant had had some trouble with the law when he was younger and had even had a previous gun charge. But even the author himself acknowledged that he seemed to be trying to turn his life around. That's aside from the fact that he did not have a weapon at the time of the shooting, was not aggressive in any way, and did not resist at all. This was proven by multiple witness statements and multiple videos taken at the time. So, when it comes to this incident, he WAS an innocent victim; victim blaming has no place here whatsoever.
This book was published in 2013, the same year the movie about this case came out. At the time of the movie release, I wasn't interested in seeing the movie because I knew that it would show a clear cut case of murder and would only make me angry and sad. But since I decided to expand my reading interests beyond romance and serial killers, I've been adding all kinds of things to my library. (I'm still wavering on whether or not to see the movie.) Bottom line: this isn't exactly exceptionally written. You could read 2-3 articles on the case and pretty much get the exact same information, and probably more.