A Worcester paedophile case solved after being featured on Crimewatch is to feature in a special follow-up tonight.
In September 2005 Andrew Hall was jailed for 15 months for grooming children, in what police described as a "shocking" case.
Thanks to the programme, aired in November, two others were convicted and Hall was reconvicted over charges of intimidating witnesses.
Detective Sergeant Andy Price, who led the inquiry, said it was the worst example of witness intimidation he had encountered in 17 years with West Mercia constabulary.
The intimidation involved a physical attack and threats to the victim's family.
In June Hall (42), from the Norton area of Worcester, was sentenced to seven years imprisonment; his sister Alyson Hall (40), from Redditch, to four and Joseph Samuel (42), from Worcester, to five. All three were convicted at Worcester Crown Court for conspiracy to pervert the course of justice.
Det Sgt Price said: "This was a shocking case. The defendants were responsible for a terrifying ordeal of intimidation intended to prevent evidence being given to the courts that could convict Andrew Hall.
"I hope the victims will be able to put the trauma they experienced at the hands of the Halls and Samuel behind them and move forward."
He said the programme highlighted the value of reporting incidents and encouraging witnesses to come forward promptly.