Tiffany Lynn Is Missing (Jett Thacker #1)
Dan Alatorre

But the mother keeps getting letters from the daughter saying “Don’t worry, and don’t look for me.” They are in the deceased girl’s handwriting and there’s even a DNA match - but the body at the morgue is definitely her.
With their missing persons case resolved and the corpse showing no sign of foul play, police close the investigation – so the brash young investigative TV reporter Jessica Eve Tims-Thacker aka "Jett" is retained to find out why the strange letters keep coming. Is it part of a kidnapping plot gone wrong, a cruel joke by an anonymous prankster, an extortion scheme to drive the mother insane - or something much more sinister?