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.
The Derbyshire house formerly owned by Mick Philpott has been razed to the ground.
The fire-ravaged home was pulled down after the blaze which killed all six of the man's children.
Parents Mick and Mairead Philpott were jailed in April, with friend Paul Mosley, after being found to have started the petrol-fuelled fire.
The three were convicted of killing the couple's six children.
More housing will be built on the site following the work.
Work has begun on pulling down a house in Derby where six children were killed in a house fire.Read the full story ›
The house in Derby where six children died in a house fire is being demolished. The demolition has been underway for nearly three hours this morning, after workmen spent the last week preparing the house for its destruction.
Parents Mick and Mairead Philpott have been jailed for their childrens' murders.
Demolition work is underway on the neighbouring property to the Philpott house in Derby.
Preparation work to take down both semi-detached houses in Victory Road, Allenton, began last week, but the demolition has begun in earnest this morning.
The grandmother of six children who died in a house fire said they will be able to rest in peace now their former home is being demolished.
Vera Duffy, Mairead Philpott's mother, said she had wanted to see the start of the demolition process to end the tragic chapter in the family's history.
Derby City Council said the process of demolition is likely to take up to three weeks; one week to prepare the site and a further two weeks to take down both properties, beginning with the outbuildings and roofing structures.
New social housing is expected to be built on the site.
Demolition of the house in Derby where six children were killed in a house fire starts today.
The fire which killed the six children took place on 11th May 2012.
In April this year Mick Philpott, his wife Mairead, and their friend, Paul Mosley, were all found guilty of manslaughter following a seven week trial at Nottingham Crown Court.
Mick Philpott was jailed for life. Mairead Philpott and Paul Mosley were both jailed for 17 years. Both Mairead and Mosley are appealing against their sentences.
The site will be developed into new housing.
We can confirm that officers from Derbyshire Constabulary are making inquiries into allegations of further offences committed by Mick Philpott.
These allegations came to light during the investigation into the fire in May last year in which his children died. He, his wife and their friend were later convicted of the manslaughter of six children.
Investigations are continuing and it would be inappropriate to make any further comment at this time.
Derbyshire Police have confirmed they launched an investigation into allegations of further offences committed by Mick Philpott.
Philpott and his wife Mairead were jailed in April after being convicted of the manslaughter of their six children. Jade, 10, and her brothers John, nine, Jack, eight, Jesse, six, Jayden, five, and Duwayne, 13, died following a fatal house fire at their Derbyshire home.
Lanterns were lit in Derby on Sunday in remembrance of the six Philpott children who were killed in a house fire started by their father.
Jade, 10, and her brothers John, nine, Jack, eight, Jesse, six, Jayden, five, and Duwayne, 13, died last May.
On Sunday, Derby City Council confirmed its intention to knock down the property and the adjoining semi.
His wife Mairead, and their friend Paul Mosley, have been sentenced to 17 years.