Elliott Williams tried to tell guards at an Oklahoma jail that he had broken his neck.

But surveillance footage shows staff members at the Tulsa County Jail throwing trays of food toward him and placing water out of his reach as he struggled to move on the floor. They dragged him on a blanket from another cell, and would later say he “acted as if paralyzed” and wanted “to be waited on.”

Elliott Williams was eventually found dead in his cell, lying naked on the floor.

More than eight years later, the county agreed this week to pay $10 million to the estate of Mr. Williams, marking the end of a civil rights lawsuit filed by his parents.

By the time he died, he had been injured for five days, and the jail recorded the final 51 hours of his life from a monitored medical unit.

“It’s so disturbing,” said Dan Smolen, the estate’s attorney. “There were dozens of people who came in contact with Elliott Williams in the Tulsa County Jail and laughed at him, mocked him, thought he was faking and didn’t do anything.”