The State of the Vatican City is a unique country because of its political configuration. Beside from being the smallest country of the world, its form of government, constitution, and its political system presents particularities. In it, various actors not common in other systems relacionate and intervene. In the inside of this system we can find other subsystems like the judicial one. The vatican judicial system is unique and particular because, it maintains basic elements like the presence of tribunals and judges, and atributions like the jurisdictional power among others, but this State Power looks itself under the ejecutive power, this happens because of the form of government which is an absolute monarchy (the only one in Europe in the XXI century) and it is also a theocracy. We will try to attend the study of the system through the review or study of case, specifically the penal trail committed to the sidesman of pope Benedict XVI in the year of 2012.