Twisted Aaron Campbell is a sexual sadist who would have gone on to torture and kill more children than Ian Brady if he hadn’t been locked up, according to experts.Psychologist Emma Kenny and retired undercover detective Peter Bleksley say officers would have struggled to nail Alesha MacPhail’s murderer if he had struck before modern breakthroughs in DNA analysis.They believe the teenager, now 17, would have killed on a scale not seen since Moors Murderer Brady killed five young victims in the 60s.The pair make the claims in the first episode of their documentary series Kids Who Kill: Evil Up Close.The programme, broadcast on the Crime + Investigation TV channel tomorrow at 9pm, looks at the circumstances surrounding Alesha’s abduction,
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