The inquest has begun into the death of a 35-year-old black man, Kevin Clarke, who died after being restrained by police in south London in 2018.
Mr Clarke, who suffered from schizophrenia and paranoia, was having a mental health crisis when officers intervened.
The inquest will look into whether the actions of officers contributed to or caused his death – as his family said they hoped it would give them the answers they needed.