Only okay –
There were 2 completely unrelated cases, once probably closer to what detectives actually have to do, but it's not totally satisfying for the reader. Jumping back and forth between scenarios and situations was more than a little unsettling! And it was totally unclear when the 1st one ended and whether there was ever any cleaning up of details (perhaps I missed it?) Michael Connelly has been a favorite author, but my experience with the last couple books of his that I have read has totally turned me off :-(.