R.I. Gen. Laws § 8-2-34: Impaneling and instruction of grand juries.

All grand juries shall be impaneled by the superior court. They shall be empowered, required, and charged to diligently inquire and make true presentment of all crimes and offenses done or committed within their jurisdiction, and shall, insofar as may be deemed necessary, be instructed by the court in the law relative thereto.