Nikki Allan murder: Man arrested over 1992 death
A man has been arrested and bailed in connection with the murder of a seven-year-old girl more than 21 years ago.
Nikki Allan was found in the then-derelict Old Exchange Building, near her family home at Wear Garth, Sunderland, in October 1992. She had suffered 37 stab wounds.
A 43-year-old was arrested on suspicion of murder. He was later bailed.
In September the BBC's Crimewatch featured an appeal and reconstruction of Nikki's last movements.
Two years after her death a neighbour was acquitted of murder.
The trial heard that although he had confessed to the killing a judge ruled police had used "oppressive methods" during questioning and he was found not guilty.