No Man’s Land (John Puller #4) by David Baldacci

Two men. Thirty years.

John Puller's mother, Jackie, vanished thirty years ago from Fort Monroe, Virginia, when Puller was just a boy. Paul Rogers has been in prison for ten years. But twenty years before that, he was at Fort Monroe. One night three decades ago, Puller's and Rogers' worlds collided with devastating results, and the truth has been buried ever since.

Until now.

Military investigators, armed with a letter from a friend of Jackie's, arrive in the hospital room of Puller's father--a legendary three-star now sinking into dementia--and reveal that Puller Sr. has been accused of murdering Jackie.