In Too Deep: Jennie McGrady Mysteries, cartea 8

Jennie McGrady s summer has just settled back into a comfortable lull when her chemistry teacher, Tom Mancini, turns up dead from a drug overdose in his lab at Trinity High School. A suicide note seems to close the case, but Jennie smells foul play especially since a series of break-ins had been reported at the school and her sleuthing uncovers some unsettling information. The hard part comes when she must convince police to investigate without implicating herself in the crime.