"Dead Girls Don't Lie" by Jennifer Shaw Wolf

Jaycee and Rachel were best friends. But that was before. Before that terrible night at the old house. Before Rachel shut Jaycee out. Before Jaycee chose Skyler over Rachel. Then Rachel is found dead. The police blame a growing gang problem in their small town, but Jaycee is sure it has to do with that night at the old house. Rachel's text is the first clue--starting Jaycee on a search that leads to a shocking secret. Rachel's death was no random crime, and Jaycee must figure out who to trust before she can expose the truth.