The Bitter Past book by Bruce Borgos

In the tradition of Craig Johnson and C. J. Box, Bruce Borgos's The Bitter Past begins a compelling series set in the high desert of Nevada featuring Sheriff Porter Beck…

Porter Beck is the sheriff in the high desert of Nevada, north of Las Vegas. Born and raised there, he left to join the Army, where he worked in Intelligence, deep in the shadows in far off places. Now he's back home, doing the same lawman's job his father once did, before his father started to develop dementia. All is relatively quiet in this corner of the world, until an old, retired FBI agent is found killed. He was brutally tortured before he was killed and clues at the scene point to a mystery dating back to the early days of the nuclear age. If that wasn't strange enough, a current FBI agent shows up to help Beck's investigation.

In a case that unfolds in the past (the 1950s) and the present, it seems that a Russian spy infiltrated the nuclear testing site and now someone is looking for that long-ago, all-but forgotten person, who holds the key to what happened then and to the deadly goings on now.