The Clue in the Trees
Margi Preus
Francie plunges into her senior year of high school near Minnesota's Enchantment Lake, but when her long-lost brother, Theo, turns up, so does a dead body, and Francie is drawn into another mystery.

by James C. Dekker (2008)
As Megan digs deeper into her brother's murder, she finds that Danny was "known to police" and that nobody outside of her family cares about solving the crime.
Margi Preus
Francie plunges into her senior year of high school near Minnesota's Enchantment Lake, but when her long-lost brother, Theo, turns up, so does a dead body, and Francie is drawn into another mystery.
Jennifer Lynn Barnes
Seventeen-year-old Cassie Hobbes has a gift for profiling people. Her talent has landed her a spot in an elite FBI program for teens with innate crime-solving abilities, and into some harrowing situations. After barely escaping a confrontation with an unbalanced killer obsessed with her mother s murder, Cassie hopes she and the rest of the team can stick to solving cold cases from a distance. Cassie Hobbes and the other members of the Naturals program of the FBI work to solve a string of serial murders carried out by a copycat killer. The plot contains sexual situations and graphic violence. Book #2
Phyllis Reynolds Naylor
After several bombs go off around town, eleven-year-old Bernie Magruder becomes suspicious of various members of his family, causing confusion in Officer Feeney's investigation and around the hotel that his parents run.
Sherri L. Smith
Bad things happen everywhere. Even in the land of sun and roses. When Jude's best friend is found dead in a swimming pool, her family calls it an accident. Her friends call it suicide. But Jude calls it what it is: murder. And someone has to pay.