When police are called in to investigate a crime, what powers and limitations apply to them? What are their rights to question strangers, search without warrants, or detain individuals who might become suspects? <i>Crime Scene Investigations</i> breaks down the Supreme Court's decisions on questions like these into clear and practical terms. <br>       Police need to be vigilant, since the line between a lawful search and an improper one can be dangerously thin, and officers can be held accountable for any wrongdoing, intentional or not. The controversy surrounding such techniques as "stop-and-frisk" sweeps and compulsory DNA testing underscores the importance of understanding the legal dimensions of police powers. Because interactions between law enforcement officers and civilians are often charged with complexities, <i>Crime Scene Investigations </i>provides a level-headed guide, indispensable for those on either side of an investigation.