Murderer Vincent Tabak is facing further questioning by police after being jailed for killing Joanna Yeates.
The 33-year-old turned from sordid voyeur to murderer after becoming obsessed with images of women being strangled during sex.
He also paid a prostitute having trawled escort and violent pornography websites.
That the Dutchman was to be interrogated further by police came to light at Bristol Crown Court as the prosecution tried to stop information about Tabak's depraved sex secrets becoming public.
The fresh allegations relate to material discovered on Tabak's computer hard drive.
Nigel Lickley QC told the court it was necessary for Tabak to be questioned about the matters, but spoke cryptically in order not to reveal the full details.
The prosecutor said following questioning of Tabak a decision would be made as to whether proceedings would be commenced.
Jurors were not told how videos found on Tabak's laptops had chilling parallels with the way Miss Yeates died.
His pornography depicted blonde women being throttled during sex or bundled into car boots.
Avon and Somerset Police have refused to give any more information on what Tabak may be questioned about.