The document discusses why multiple witnesses at a crime scene may fail to help the victim. It summarizes research on the bystander effect, which found that people are less likely to help when others are present due to two factors: 1) pluralistic ignorance, where witnesses fail to recognize an emergency situation because others are not reacting; and 2) diffusion of responsibility, where each witness feels less personally responsible when others are also present. The research suggests that to increase the chances of help, witnesses should trust their own judgment of an emergency rather than assuming others know more, and victims should directly address individuals to make them feel fully responsible.