Preface. Part One: Special problems of police science. Chapter I. The beginning of law enforcement. II. Introduction to scientific crime detection. III. Criminal investigation - August Vollmer, Chief of Police, Professor of Police Administration. IV. Detection of counterfeit money - Frank J. Wilson, Chief, United States Secret Service, Treasury Department. V. Police courtesy - Oscar G. Olander, Commissioner, Michigan State Police. VI. On the witness stand - Mason Ladd, Dean of lhe College of Law, University of Iowa. VII. Moulage - R. W. Nebergall, Chief, Iowa Bureau of Investigation. VIII. Photography - Frederick W. Kent, University Photographer, University of Iowa. IX. Fingerprints - Harold J. E. Gesell, Special Agent, Iowa Bureau of lnvestigation, assigned to the Technical Department. X. First Aid - Dr. Fred J. Jarvis, Seattle, Washington. XI. Revolver shooting - J. F. Butler, Lt. Col., Infantry U. S. A., Fort Bragg, North Carolina. XII. The law of arrest. XIII. An experiment in traffic safety. Part Two: Introduction to criminal law. Topic 1: General principles. I. Scope, purpose and definition. II. Causation: A. Act. B. Causation and responsibility distinguished. C. Legally recognized consequences of an act. D. Act of one attributed to another. Chapter III -The guilty mind. A. In general. B. "Crime" without guilty mind. C. Harmful deed and guilty mind. IV. Special defenses: A. Accident. B. Ignorance and mistake. C. Infancy. D. Insanity. E. Intoxication. F. Public authority. G. Command or order. H. Compulsion. I. Necessity. J. SeIf-defense. K. Defense of others. L. Defense of property. M. Prevention of crime. N. Consent of the person affected.O. (Wrong of the person affected). P. (Contributory negligence of the person affected). V. Parties to crime: A. Introduction. B. Classification of parties. C. Procedural problems.Topic 2: Specific offenses: VI. Introduction. A. The protection of social interests. B. Classification of crimes. Chapter VII. Offenses against the persons of individuals: A. Murder and manslaughter.B. AssauIt and battery. C. Abduction. D. Abortion. E. False imprisonment. F. Kidnaping. G. Mayhem.H. Rape. L. DueIing. VIII. Offenses against the habitations of individuals: A. Burglary. B. Arson.IX. Offenses against the property of individuals: A. Larceny. B. Robbery. C. Embezzlement.D. False pretenses and other cheats. E. Theft. F. Receiving stolen property. G. Malicious mischief.H. Forgery and uttering a forged instrument. X. Offenses against morality and decency:A. AduItery, fornication and illicit cohabitation. B. Bigamy. C. Incest. D. Seduction. E. Sodomy.F. Prostitution, obscenity and indecency. XI. Offenses against the public peace: A. Breach of the peace. B. Fighting. C. Unlawful assembly, rout and riot. D. Disturbance of public assembly.E. Disorderly house. F. Forcible entry and detainer. G. Libel. H. Carrying weapons. XII. Offenses affecting the administration of governmental functions: A. Treason. B. Perjury and subornation.C. Bribery. D. Counterfeiting. E. Misconduct or neglect in office. F. Obstructing justice or refusing to give aid. G. Escape. Prison breach, permitting escape, rescue and violation of parole.H. Compounding felonies. I. Maintenance, champerty and barratry. J. Other offensesXIII. Offenses affecting public health, safety and comfort: A. Nuisance. B. Other offenses.XIV. Federal offenses: A State criminal law adopted for "Enclaves". B. Federal criminal laws of limited application. C. Federal criminal laws of general application. APPENDIX: I. Uniform acts on Fresh pursuit and extradition'. II. The "Arrest act".