An "evil" teenager has been locked up for life for stabbing 15-year-old Elianne Andam to death in a row over a teddy bear.Hassan Sentamu, 18, had a history of attacking girls and carrying knives before he killed the popular schoolgirl outside the Whitgift Centre in Croydon, south-east London.

An "evil" teenager has been locked up for life for stabbing 15-year-old Elianne Andam to death in a row over a teddy bear.Hassan Sentamu, 18, had a history of attacking girls and carrying knives before he killed the popular schoolgirl outside the Whitgift Centre in Croydon, south-east London.