London - Detectives investigating the murder of Thomas Marshall (12), confirmed last night they could be hunting a serial killer - but stressed aspects of the case were "unique".
The death of the schoolboy, from Happisburgh, Norfolk, could be linked to three other unsolved murders in the same area, - those of Johanna Young (14), and Natalie Pearman (16), in 1992, and of April Fabb (13), in 1969.
