A Good Girl's Guide to Murder by Holly Jackson

This is the story of an investigation. Pip sees how the tragedy still haunts her town. Now, a senior for her final project, Pip decides to re-examine the closed case for her original investigation. But soon she discovers a trail of dark secrets that might actually prove Sal innocent. And the line between past and present begins to blur. Someone in Fairview doesn't want Pip digging around for answers, and now her own life might be in danger.