Devil's Rock by Geri Hill
After a third body of a murdered college student is dumped in the remote high desert near Sedona, Arizona, a team of FBI agents takes over the case at the request of the local sheriff’s department. Agent Cameron Ross soon realizes they are hunting Patrick Doe, the killer who slipped away from Tori Hunter in Partners. Agent Ross enlists the help of Deputy Andrea Sullivan as they try to find a pattern in his seemingly random dump sites.
The case opens new wounds for both of them—Andrea having to relive the horror she thought she left behind in LA and Cameron showing her scars, both physical and emotional, from her days in the Special Operations Forces, mostly spent in the Middle East. Their relationship evolves from professional to personal as they help each other through their emotional turmoil. They strive to keep the relationship casual and light, knowing it is only temporary, knowing Cameron will leave when the case is over. They didn’t count on falling in love.