PC Blakelock killing: What happened on night of riots?

A man has been found not guilty of the murder of police officer Keith Blakelock during riots in north London in 1985.

Nicholas Jacobs, 45, denied killing the officer, who was stabbed 43 times at Broadwater Farm in Tottenham.

At the Old Bailey, the jury heard from three witnesses who said they saw Mr Jacobs take part, but his defence team questioned their credibility.

Robert Hall examines the background to the case.