Answer:
King Henry ll
Step-by-step explanation:
Before the introduction of the new law on the justice system included courts and juries which was established by King Henry ll, there was no unified national legal system, each region in England had their own oral customary laws and rules. Every region or county had a local court that served justices according to their local customs.
The justice system that included courts and juries started as a customary law used by the king's court to settle conflicts and quarrels between monarchs. Even after the Norman inversion, there were still different forms of courts in the different regions and counties.
It was during the reign of King Henry ll that the justice system of courts and juries was established in 1154. He established the common law by creating a unified court system by combining the local courts from the different regions and counties to make it one unified jury system.