THE East Lancashire sister of a former paratrooper who choked to death on the floor of a police station said she hopes a TV documentary about his death will help raise the profile of the case.

Janet Alder, from Burnley, has led repeated calls for a public inquiry into Christopher Alder's death at a Humberside police station in 1998.

BBC1 documentary Death on Camera has been compiled by the team that made The Secret Policeman, a programme that led to the resignations of 10 Cheshire policemen after exposing racist behaviour.

Janet last year marched on Downing Street to demand a public inquiry into Christopher's death.

She said watching the footage of events in the police station had brought back many painful memories.

She added: "It was hard watching the film and seeing Christopher on the floor struggling for his life.

"It is something I don't want to see again. Despite the pain, however, this sort of exposure is what we have been fighting for over the last six years and it will hopefully force the authorities to answer some awkward questions."

Christopher, 37, a father-of-two died face down with his trousers around his ankles.

He had been arrested for a breach of the peace outside a Hull nightclub.

An inquest concluded that he was unlawfully killed.

In the criminal trial that followed, all five officers were cleared of manslaughter and misconduct in a public office.

Death on Camera will be shown in the Rough Justice series at 9pm on BBC1 tomorrow.