Wilmer proviso would be the answer if that question
Accused person have the right to request a witness to APPEAR IN COURT.
The Sixth Amendment of the United States granted some rights to an accused person and these include the right of the person to know the person or group of persons who have brought accusations against him. The accused also have the right to request that his accusers should appear in court and this request must be granted by the accusers.
A description of the setting
People in towns didn't have to give their produce to feudal lords and were independent if they paid their taxes, and the taxes were not as high as they were for people in the land. This caused many people to abandon their feudal lords and move to cities where they would work freely.
