Murderer Vincent Tabak kept images of children being sexually abused on his laptop computer, police have discovered.
The 33-year-old killer was jailed for life on Friday after a jury found him guilty of throttling 25-year-old Joanna Yeates.
Following his conviction at Bristol Crown Court it was revealed that the Dutch engineer was obsessed with images of women being strangled during sex and had perversions for violent pornography and prostitutes.
It also came to light that Tabak faced further questioning by police relating to material discovered on the hard drives of computers he used.
It has now been reported that Avon and Somerset Police discovered 30 images of youngsters being sexually abused.
An officer involved in the investigation, who asked not to be named, told the Bristol Evening Post that he and his colleagues wanted to clear up speculation surrounding these "other matters".
He said: "Tabak had 30 images depicting child pornography on his laptop computer at home. They were all category four images."
The officer said that, due to Tabak's conviction for murder and life sentence, he did not think the Crown Prosecution Service would take action, although the matter has been referred on to prosecutors.
There are five levels of seriousness for offences involving indecent photographs of children, which start with images depicting "erotic posing with no sexual activity". Category four images depict penetrative sexual activity involving a child or children, or both children and adults.
Despite being blocked from hearing of the details of his depraved sex secrets, jurors still found Vincent Tabak guilty of murdering his next-door neighbour on December 17 last year. He was jailed for life by Mr Justice Field and told he would serve at least 20 years in prison before he could apply for parole.