ramon c. estrada , 62 , was set to be paroled in less than three weeks when he died sunday at the prison in draper , utah .
estrada was scheduled to have dialysis friday at the prison 's treatment center , but a technician did not show up on friday or saturday .
adams said six other inmates had been waiting for dialysis treatment and were taken to a hospital for evaluation .
estrada was serving time for a 2005 rape conviction .