In September 2003 Mikey Powell, a 38-year-old father of three children, was arrested by the police following a disturbance outside his home west of Birmingham.
Following his death in police custody, an inquest jury found that he had died as a result of the way officers had restrained him while in their care.
"It's really disturbing that these sorts of things can be allowed to happen... Unless you're involved personally you don't realise what's happening," grieving parent Mrs Lewis told the Today programme's Andrew Hosken. "It's got to stop."
"In the last 30 years there has never been a successful prosecution of a police officer, despite the fact that at 11 inquests into these deaths, inquest juries have returned verdicts of unlawful killing," warned Inquest's Deborah Coles.
"They believed that there had been an issue about manslaughter."
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