The police officer who was shot dead in south London has been named as Matt Ratana.
Mr Ratana, aged 54, who was a custody sergeant, was killed after being shot by a man who was already in custody.
The suspect - a 23-year-old man - then turned the gun on himself and was taken to hospital, where he is still in a critical condition.
The incident took place at around 2.15am at Croydon custody centre.
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