I thought this was an incredibly interesting premise, especially with how true crime is treated in our society today. I really liked a lot of this - quick pace, interesting characters, fun (if predictable) twists. Just a couple of things I would have liked to see considered:

- The commodification of true crime in this extreme of a way would have much more severe impacts on society than what was developed in this novel. We can see today the crimes and atrocities people commit for notoriety and attention; this would only be exacerbated by the existence of Past Crimes even without a monetary aspect. The impact of this technology on how society functions could have been developed more.
- West Valley City does not have a subway system and this book pays enough attention to real-life detail that that seemed like a glaring error to me.
- I hate when fiction references current day media, trends, and people. I didn't mind Ted Bundy or Abe Lincoln or Jonestown being mentioned because that was relevant to this book. But Donald Trump Jr. running for president? One of our characters reads THE INIVISBLE LIFE OF ADDIE LARUE? Thanks I hate it.

I still thought this was a good thriller and and interesting premise, but could have been fleshed out a little more.