Blood Trail — Nancy Springer

The gruesome murder of a popular high school student turns two small-town neighbors against each other Aaron Gingrich is a well-liked high school senior who always seems to have a smile on his face. He and Jeremy Davis have been inseparable since elementary school. But one day Jeremy senses that something is wrong at Aaron’s house—and then Aaron is found brutally murdered. Reeling from the loss of his friend, Jeremy has no one to turn to. His small town is suddenly abuzz with grisly rumors, and Jeremy was the last person to see Aaron alive. Subjected to polygraph tests, ostracized by the whole community, and treated like a criminal, Jeremy knows he needs to go to the police. Meanwhile the killer still walks free—closer than anyone can imagine. And no one but Jeremy suspects the truth.