Robert Thompson and Jon Venables, both 10, abducted James Bulger in 1993 Search party started at Strand shopping centre, Bootle where he disappeared Alex Radnor-Boulton retraced steps out of centre and suggested checking CCTV Local business AMEX found 'breakthrough' footage of boys walking off nearby Led to Bulger's body being found on railway line and later conviction of Venables and Thompson