Mick Philpott will not face charges over claims that he raped two women, Derbyshire Police said today, due to "insufficient evidence".
In a statement, the force said: "Derbyshire Constabulary is not currently investigating any allegations against Michael Philpott.
"The allegations were reviewed and there was insufficient evidence for further action."
The rape allegations came to light during the investigation into the fatal house fire at Philpott's Derby home in Derby.
Philpott was found to have started the blaze, which killed six of his children. He is serving a minimum 15-year sentence for manslaughter at Wakefield Prison.