In this book, the Fourth Amendment to the United States Constitution is explained in simple terms. Who can a police officer search; and where can he search? What happens to evidence found when the search is later found to violate these rules? Are there exceptions to the constitutional requirement to obtain a search warrant before the search? The question asked by legal scholars over 75 years ago is still with us--Should the criminal go free because the constable has blundered? These are the issues discussed in this book and no police officer is ready for the street until they are mastered.