Leave No Trace by Jo Callaghan, 400 pages
Previously focused on cold cases, Detective Kat Frank and her AI assistant Lock are given their first "live" case: the murder of a man crucified at the top of a hill in a highly contaminated crime scene. Kat's superiors hope that by allowing the human-AI detective pair to investigate will be a PR boon, showing how the police department is using state-of-the-art technology to assist in the solving of crimes. However, Lock's lack of tact and humanity causes problems as the case explodes into a serial killer situation.
This was a surprisingly nuanced look at technology and policing, considering the pros, cons, and gray areas in a way that I didn't expect in a murder mystery. The characters, including Lock, are all three-dimensional and compelling, and the inherent mystery kept me guessing. This is the second book in the series (after In the Blink of an Eye), but stands well by itself even if you haven't read that one (I haven't yet, though I certainly will).
Also, this has nothing to do with the content of the book, but there is a note that the cover was created with AI. Leaving aside all the problems with AI art, I found it somewhat apropos that it was used for this particular book.

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