Inmates, correction officers and investigators are testifying in Milwaukee this week to help determine whether jail employees will be charged with abuse in the dehydration death of an inmate who the authorities say was deprived of water for a week.

Prosecutors and a lawyer representing the estate of the inmate, Terrill Thomas, say that correction officers turned off the man’s water supply in an isolation cell in April 2016, and that he was unable to ask for help because he was having a mental health crisis. He died on April 24, 2016.

In March, the Milwaukee County district attorney’s office requested an inquest, a relatively uncommon legal procedure in which a cause of death is examined for possible criminal charges. After a week of testimony, jurors will decide whether to recommend charges against jail employees, though the district attorney is not bound by the recommendation.

Erik Heipt, the lawyer representing Mr. Thomas’s estate, said in an interview on Monday that Mr. Thomas, 38, had bipolar disorder, and that “he was not operating in a world of reality” when he was jailed.