Zero Day by David Baldacci

Military investigator John Puller has been assigned a case involving the murder of a military person and his family in the small town of Drake, West Virginia. The local sergeant Samantha (Sam) Cole welcomes Puller's help and assistance. Puller is nothing if not thorough and the clues don't make any sense. Stubborn as a mule, he keeps digging as yet more people are killed with two attempts on his life as well. This reader predicts that John Puller will be found in more of Baldacci's novels. A thrilling page-turner, hard to put down.