Over The Edge

Description for OVER THE EDGE by Hal Friedman:

A Lesson In Evil

Bad things don't happen in Knollwood, an affluent, picture-perfect small town. At least not until a junior-high class trip to a state forest ends in the death of a revered teacher. Was it an accident, or something far more sinister?

No one in this tight-knit community seems to care except Meg Foley, the dead teacher's young replacement. Determined to find answers, Meg looks to the students--but if they know what happened, they aren't telling. Neither are their parents.

The deeper she probes, the more Meg unravels a tapestry of evil that goes far beyond this one death--and the more dangerous her situation becomes. Surrounded by enemies and running out of time, Meg turns to maverick police detective Dan Jarrett for help and protection. If they don't discover the truth fast, she just may be taking an involuntary leave of absence herself--permanently.

This is #2 in LAPD Captain Dan Jarrett,