I've Got You Under My Skin by Mary Higgins Clark

I've Got You Under My Skin: A Novel - Dr. Greg Moran was murdered in front of his 3-year-old son Timmy.  Because the killer wore a mask, all Timmy saw was blue eyes.  A passerby heard the killer's threat, "Tell your mother she's next, then it's your turn..."  Still haunted by her husband's death and unsolved case five years later, Laurie Moran produce's a cold case reality show; the pilot, a 20-year-old case concerning the murder of a woman the morning after her daughter's graduation party.  Leo Farley, Laurie's father, believes that his son-in-law's murderer will use the pilot to carry out the threat.

It is the characters of this story that Clark and Alafair Burke employ in their series Under Suspicion