In the Unites States the existence of statutes that allow to declare forfeiture of the property used in certain prohibited ways in civil proceedings without the general safeguards of criminal law is an extended legal practice. This parallel law enforcement system, however, has raised several constitutional discussions. One of these debates concerns the compatibility of the parallel system with the double jeopardy clause: does the double jeopardy clause bar the government from bringing a civil forfeiture proceeding against a defendant that has previously been convicted in a criminal court for the same offence? The aim of the present article is studying the evolution of the case law of the Supreme Court of the United States on the constitutionality of parallel civil forfeiture proceedings and criminal prosecutions under the double jeopardy clause, analysing the current state of the jurisprudence and its possible further developments.