“The three 5ft-high (1.5m) robots involved in the prison trial have been developed by the Asian Forum for Corrections, a South Korean group of researchers who specialise in criminality and prison policies. It said the robots move on four wheels and are equipped with cameras and other sensors that allow them to detect risky behaviour such as violence and suicide.”
BBC News - Robotic prison wardens to patrol South Korean prison

“The three 5ft-high (1.5m) robots involved in the prison trial have been developed by the Asian Forum for Corrections, a South Korean group of researchers who specialise in criminality and prison policies. It said the robots move on four wheels and are equipped with cameras and other sensors that allow them to detect risky behaviour such as violence and suicide.”

BBC News - Robotic prison wardens to patrol South Korean prison

BBC