Rochin v. California, 342 U.S. 165 (1952), was a case decided by the Supreme Court of the United States that added behavior that "shocks the conscience" into tests of what violates due process clause of the 14th Amendment.

Justice Frankfurter wrote the majority opinion which struck down the prior conviction, arguing that the brutality of the means used to extract the evidence from Rochin "shocks the conscience," and it clearly violates the due process of law as guaranteed by the Fourteenth Amendment.

Frankfurter also admitted the term "due process" was nebulous but asserted that it existed to preserve the fairness and integrity of the system and that society expects judges to act impartially and to take into account precedence and social context.

[6]Justice Douglas and Black both wrote concurring opinions in which they argued that the lower court's decision should have been overturned based on the Fifth Amendment liberty from self incrimination.

He argued the opinion enabled the court to nullify the California state law of using illegal evidence based on due process because its application, "shocks the conscience," but then admonishes judges to be impartial and use the society's standards in judgment.