Which One Dies Today? — James C. Paavola

This is the third book in the Murder In Memphis series: Car bombs, a serious weapon of choice--matching family members' pain when a loved one dies because their health insurance company's priority is its bottom line. A powerful motive for murder. Two car bombs are detonated, then a third--two people are killed, two maimed. Memphis Police Lieutenant Julia Todd discovers that many health insurance companies have been using their version of death panels, denying life-saving medical treatment while their policyholder dies. Using one Iraq War demolitions specialist to catch another, two bombs are found and diffused. The bombers up the ante--pledging a suicide pact and adding police to the target list--Julia is number one.