The double jeopardy principle is a guarantee of individual liberty that has ancient origins. The development of the principle has been incremental, and its meaning has varied through the ages. The research question and attending analyses presented in this article advances an examination of the evolution of the double jeopardy principle in historical context. Through doctrinal analysis the hypothesis advances the supposition that the common law principle was firmly established by the post-medieval period. Through an examination of landmarks in the development of the principle the article examines theoretical underpinnings and considers the extent to which the criminal justice system developed a public prosecution model of criminal justice. The incremental development of this fundamental principle of criminal justice can be explained in terms of the deficiencies in medieval criminal procedure, prejudices and practices of medieval trial procedure and punishments imposed on convicted offenders. Jurisprudence on the application of the principle indicates significant developments following the Restoration.