What is the term for a group of citizens that determines the outcome of a criminal trial?

The term for a group of citizens that determines the outcome of a criminal trial is a Petit Jury. This jury is typically composed of a small group of individuals, usually consisting of 6 to 12 members, who listen to the evidence presented during the trial and deliberate to come to a unanimous or majority verdict regarding the defendant's guilt or innocence. The Petit Jury plays a crucial role in the judicial process, as it serves as the fact-finder in both criminal and civil cases.

In context, a Grand Jury, while also consisting of citizens, serves a different purpose. Its function is to review evidence presented by the prosecution to determine whether there is enough cause to charge someone with a crime, not to determine guilt in a trial. The other options, Plea Jury and Trial Consortium, are not recognized legal terms related to the process of determining the outcome of a trial. Thus, the identification of the Petit Jury is accurate and aligns with established legal terminology.