Sentence:  The judge became ill just as the Colfax District Court convened , no <WSD>substitute</WSD> was brought in , no criminal cases heard , only 5 out of 122 cases docketed were tried , and court adjourned sine die after sitting a few days instead of the usual three weeks . 
Meaning of the word marked with <WSD> tags:  a person or thing that takes or can take the place of another