This chapter from Outdoor Emergency Care: A Patroller's Guide to Medical Care (6th edition) outlines essential knowledge for OEC Technicians on Behavioral Emergencies and Crisis Response. It details the resources available for instructors and students, including textbooks, online materials, and multimedia. The core of the chapter focuses on equipping Outdoor Emergency Care (OEC) technicians with the knowledge and skills to define, identify, assess, and manage behavioral emergencies, emphasizing rescuer safety and appropriate intervention, including the use of restraints when necessary. The text also addresses the causes of behavioral emergencies, differentiating between mood/affective disorders and psychotic disorders, and concludes by discussing the importance of critical incident stress debriefing for responders.