This training manual provides guidance to trainee police officers on police powers and procedures related to stop and search, arrest, detention, and questioning of suspects. It explains that police have specific investigatory powers governed by legislation like the Police and Criminal Evidence Act 1984 and related codes of practice. The manual discusses balancing police powers with individual rights, and outlines the steps officers must take when conducting a stop and search according to the GOWISELY procedure to ensure searches are lawful.