South Korean authorities are now experimenting with robotic prison guards. The robotic wardens have more in common with the Death Star's delivery droids. Their responsibility, will expand as technology improves. Reuters says:
The robot has been designed to patrol a prison autonomously, but an IPad will allow manual control as well. The next step, say designers, is a robot that conducts body searches although they admit, neither the technology nor the prison system is quite ready for a step that far into the future.