The church copied the assize procedure developed by the Royal Court to detect ecclesiastical offenses. Trial was still by compurgation. Bishops could request the Chancery to imprison an offender who had remained excommunicant for forty days, until he made amends. Chancery complied as a matter of course. This went on for six centuries.
The delineations of jurisdiction among these courts were confused and there was much competing and overlapping of jurisdictions. However, the court could appoint arbitrators or suggest to the parties to compromise to avoid the harshness of a decisive judgment which might drive the losing party to violent self-help.
The office of coroner was established about 1194 to supplement the judicial investigations of crimes with local officers prior to the arrival of the itinerant justices. Four knights who were residents of the county and possessed sufficient land were elected by the county court for life. Sometimes they had county and royal connections instead. They received no pay. They determined if sudden deaths were accidental or due to murder and the cause of death of prisoners. They also held inquests on other crime such as bodily injury, rape, and prison break. They attached [arrested] the accused and evaluated and guarded his chattels until after the trial. If the accused was found guilty, his possessions went to the King. The coroner sat with the sheriff at every county court and went with him on his turns. This office and the forbidding of sheriffs to act as justices in their own counties reduced the power of the sheriffs. The responsibility of receiving the oath of the peace is changed from the sheriff to knights, the duty of the sheriffs being only to receive and keep the criminals taken by these knights until the justices came to try them.
Also, at this time, the constitution of the grand jury of the county was defined. First, four knights were to be chosen in the county court. These were to select on oath two knights from each hundred. These two, also on oath, are to add by co-optation ten more for the jury of the hundred.
In London, if one of two witnesses for the defense died while an action was pending, the survivor, after offering his oath, could proceed to the grave of the dead witness, and there offer oath as to what the dead man would have sworn if he had been alive. If a foreigner was bound to make oath for debt or any misdeed, he could make it with six others, his own oath being the seventh; but if could not find six supporters, he alone could make the oath and take it in the six nearest churches.