Steven Havill, Blood Sweep
Poisoned Pen Press, 2015
Also available as an ebook
Undersheriff Estelle Guzman discovers that her older son Francisco is performing in a concert in Mazatlan, Mexico (you'll find out why she didn't know).
Sheriff Bobby Torrez is shot at and barely misses being killed, while out hunting antelope.
A representative of a development company has come to Posadas to pitch plans for a hotel/conference center (and other facilities), spinning off the ongoing development of the astronomy development (see Night Zone, the previous book in the series for this development).
Retired sheriff Bill Gastner experiences a health crisis.
Guzman's (adoptive, 99-year-old mother) receives an odd phone call seeking money. And Guzman's younger son, Carlos, receives a strange phone call from someone purporting to be Estelle's uncle.
There's a lot going on here, and Havill handles it all expertly. The characters we have met and now know well from the previous 19 books in the series remain interesting, true-to-life, the setting is expertly evoked. And the resolution has some surprises for us as well. Beautifully done.