What does a grand jury do?

A grand jury plays a crucial role in the judicial system, particularly in the pre-trial phase of criminal proceedings. Its primary function is to evaluate the evidence presented to it and determine whether there is enough probable cause to formally charge an individual with a crime. This process is essential as it serves as a check on prosecutorial power, ensuring that individuals are not subjected to criminal charges without sufficient evidence.

Unlike other functions described in the incorrect options, the grand jury does not create laws, review appeals, or conduct trials. Instead, its focus is solely on deciding if the evidence is strong enough to warrant the initiation of a criminal case, providing a safeguard for individuals against undue prosecution. This process helps maintain the integrity of the legal system by ensuring that charges are based on credible evidence.