The Body in the Wheelbarrow

None of the other derby race car drivers like Sparks Stiller. When he's around, accidents happen, but no one ever sees exactly what actually caused them. Until someone catches him in the act...and Sparks ends up dead, propped in a wheelbarrow, and left beside Doc Muller's garage. Doc works at Jazzi's father's hardware store, and her dad calls Jazzi to ask her to put in a good word for Doc with her friend Detective Gaff. That's all she can do, because Gaff has a new partner--Caden, and Caden doesn't tolerate anyone interfering in his work. Caden warns Jazzi to stay out of the investigation. But there's nothing wrong with going to the racetrack, is there? And while she's there, she might as well meet the drivers...