Joseph Wambaugh has been writing crime fiction and true crime books since the 1970s and every one that I have read by him has been good. He was a member of the Los Angeles Police Department for at least a few years (not sure how long) and so his sympathies are with the police, especially the officers on patrol (as opposed to their bosses or the politicians that oversee the police departments, neither of whom receive a particularly sympathic portrayal).
This is one in the series of books set in the Hollywood, California police Station. As usual, I'm pretty sure I've read these books out of order. The books follow a cast of characters who work at the Station and of course, those in the community around them. Ostensibly, the main character is Nate Weiss, who wants to become an actor and is therefore referred to as "Hollywood Nate," but he's really just one of many characters. In this book, "Crows" is an acronym for community relations officers, who are perceived as having an easy, low-risk job, but who often can see that little complaints may indicate much bigger problems without being able to do much about them. That is definitely the case in this book, although I can't say more without giving away one of the story lines.
I enjoy these books for their odd combination of humor and misery. There are many different story lines, some of which intersect and some of which don't, and many of them are very funny, but others are extremely sad. And the sad ones are always about the damage we do to those who are closest to us. In all of the sad situations, at least one police officer--and often several of them--have a very bad feeling about a situation but can't do much of anything to prevent a terrible outcome.
I would recommend this series, but start with the first book and read them in order--the recommendation I usually fail to follow myself. I also recommend his other non-series fiction and his true crime stories. I'm going to post a separate review of one of the true crime books, mostly because it is set in England, but all of them are very very good.