A disabled campaigner from Doncaster sat in front of a judge with a ‘not guilty’ label stuck to his forehead.
Allen Vincent wore the homemade sign during a two-day hearing at Sheffield Crown Court.
He also taped up his mouth and wore a placard around his neck, proclaiming his disabilities.
On the reverse of the placard was a string of complaints against individuals, various authorities and the police.
The 41-year-old former car salesman, of Tait Avenue, Edlington, was appealing against his conviction and sentence by magistrates for criminal damage to a police cell.
He suffers from autism, Asperger syndrome and bilateral permanent hearing loss, and is campaigning against what he calls his unlawful treatment.
He won a partial victory in that an order to pay £405 costs and compensation was quashed – but he will still have to serve a 12-month community order.
But the judge, who sat with two magistrates, said he could not make any findings on a list of complaints handed to him by the defendant.
The court heard Vincent was arrested on February 28 for breaching bail conditions and was detained in a cell at Doncaster police station.
A nurse attended to assess his fitness to be detained, but he refused to co-operate. The next morning he was found naked and had covered himself with excrement and written on the walls.
He swore and threw excrement at a duty officer and urinated on a cell door, refusing to clean himself up. Vincent said he did not accept he had damaged the cell and had been unlawfully arrested several times.
Because he has difficulty in communicating he was allowed to submit his complaints in writing, and handed a lengthy dossier to the judge, Recorder Ian Harris – who said the court had sympathy with his problems but Vincent knew what he was doing.
The court heard he spent nine days in Doncaster Prison on remand.