Ben Oxley is shot in the head at point-blank range while sleeping in bed; his wife becomes the focus of the investigation, but it will take years before investigators bring the killer to justice; sometimes crimes occur when key characters are asleep.

A teenager sleeps through the murder of her father, Ken Eaton, at their home; as detectives probe into the beloved teacher's secret love life, they unravel a web of heartbreak, deceit and desire.

In June 2009, 61-year-old Wendy DiRodio's elderly mother discovers Wendy's body in the bedroom of their shared Ventura County, Calif., home; another murder weeks earlier leads investigators to wonder if a serial killer is on the loose.

In Palm Beach County, Fla., detectives discover pregnant mother of three, Makeva Jenkins, brutally murdered in her sleep; they delve into her extensive use of social media as they look for clues, uncovering a twisted plot and betrayal.

After Greg Fleniken checks into a Texas hotel, police find him murdered in his sleep; when the case runs cold, a Long Island PI joins the investigation and uncovers a chilling conspiracy that no one saw coming.

When a home invasion leaves Bill Ross murdered in his sleep, detectives in Shelbyville, Tenn., scramble to uncover the identity of a pair of masked men; as they dig deeper, they discover a troubling web of secrets and lies.