Shock Point by April Henry

Cassie discovers that her stepfather, Rick, a teen psychiatrist, has been illegally prescribing a new behavioral drug to his patients?and three teens have died. Before she can report him, Rick commits Cassie to Peaceful Cove, a boot camp for troubled teens in Mexico. Cassie knows she has to get out now, before more teens die. But no one has ever escaped from Peaceful Cove alive?and even if Cassie gets over the walls and survives the Mexican desert, will anyone believe her story?