Weeping Walls by Gerri Hill

In this sequel to Keepers of the Cave, FBI Agents CJ Johnston and Paige Riley investigate a link between a fourteen-year-old cold case and a current murder. The body of a young boy was left on the grounds of an old abandoned house, eerily similar to the first case. The team, including Ice and Billy, head to a small town northeast of Houston where they find the cold case to be anything but cold. Juggling the investigation while trying to keep their love affair a secret proves to be as hard as uncovering long buried clues.