Frustration over missed investigative leads

The "Suffolk Strangler" murders horrified the UK in 2006, as five women were killed in the Ipswich area.

But should the killer have been caught years before?

Steve Wright became known as one of the country's most notorious serial killers - and admitted last week to having murdered a sixth woman in 1999.

Now, his only survivor says his victims might have survived if police had taken her seriously.

Niall speaks to Sky correspondent Emma Birchley.

Producers: Paul Wilkinson & Tom Gillespie

Editor: Piers Wisbey