This text introduces a broad, in-depth look at security planning and procedures. Students will learn to develop skills in interviewing and interrogation techniques, intelligence gathering, surveillances, perimeter and crime scene security, criminal evidence preservation and collection, and principles of crowd and riot control. Additional topics include threat assessment and response, and facility security and vulnerabilities. This text also helps students develop skills in substance abuse recognition, theft, sabotage and espionage. It also covers techniques for dealing with computer security, electronic criminal investigations, firewalls and security software as well as crime prevention techniques. Additional topics include crime prevention, security access control, and security force management. This textbook is appropriate for criminal justice, criminal investigation, and homeland security programs. It is also suited for programs in emergency management, corporate security, psychology, emergency medical services and healthcare, police academy programs, and continuing professional development.