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.

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.

A teenager sleeps through the brutal 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. Will the truth behind Ken's tragic end be unveiled?

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.

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.

In February 2008, Ben Oxley is shot in the head at point-blank range while sleeping in bed. His wife becomes the focus of the police investigation, but it will take over two years before investigators bring the actual killer to justice.