In Sickness and in Death — Lisa Bork

Jolene Parker isn't sure what to think when her police deputy husband, Ray, unexpectedly brings home a new foster child. The impulsive son of a jailed car thief, twelve-year-old Danny has talents that include picking locks and hotwiring cars.

Following Danny's brief joyride in the car that he says is his dad's, a horrific surprise turns up in the trunk: a woman's arm. While Ray hunts down the victim's identity, Jolene tries to determine whether Danny's father did the deed. And it drives her straight into the killer's sights.