1990 Strangeways Prison riot April, and 40 prisoners held a prison officer hostage for twenty-four hours after taking over a hall at HM Prison Shotts on 10 April. On 12 April, two teenage remand prisoners at HM Prison Swansea barricaded themselves into their cell for seventeen hours, and on 22 April between 80 and 100 remand prisoners staged an eighteen-hour rooftop protest at HM Prison Ashfield in Pucklechurch. On 2 April newspapers reported a weekend of "anti-authority violence", as in addition to the Strangeways riot the Poll Tax Riot had occurred in London on 31 March. Reports of the violence at Strangeways included kangaroo
Michigan State Prison rest of the convicts were eventually caught. On September 1, 1912, a riot that is described by many as the worst riot in the prison's history began. The first sign of trouble was when inmates starting throwing plates against the walls of the dining halls. Many fights followed after this and the riot lasted for six days. On the sixth day, the 90 or so inmates that were leading the riot were beaten and the riot eventually came to an end, but not until after the governor had called in the National Guard. Despite additions to the old prison, it