The Conservative MP for Wellingborough, Peter Bone has thanked people for their support after learning that he and his wife will not face charges over allegations of fraud in connection with his mother-in-law.
Mr Bone said he and his wife Jennie had been "humbled" by the support they had received.
The couple had been questioned by police in relation to a long-running dispute with Northamptonshire County Council about funding of residential care for his mother-in-law Dorothy Sweeney, which remains the subject of a civil court case.
The Crown Prosecution Service said it had assessed all the evidence passed to them by Northamptonshire Police and concluded there was insufficient evidence to bring any criminal charges.
Malcolm McHaffie, deputy head of the CPS special crime division, said: "We were asked to consider whether there was a case for fraud by abuse of position and theft by disposal of assets belonging to the woman's mother. We were also asked to consider whether there was a case of fraud by false representation to Northamptonshire Council in relation to the mother's assets.
"The evidence showed: firstly that the woman's mother considered the suspects' conduct to be acceptable; secondly that the suspects acted openly in declaring the sale of the mother's house to the Council; thirdly that no element of dishonesty could be proved. Therefore we have advised the police to take no further action."
Mr Bone said he and his wife were "delighted" that the "nightmare" had come to an end.
In a statement today, the MP said: "First, Jennie and I have been humbled by the huge number of phone calls, texts, emails and cards we have received supporting us.
"Jennie and I have just heard that we are not going to be charged with any criminal offence. This is obviously very good news and a vindication of our stance all along. As we have done nothing wrong and the Crown Prosecution Service (CPS) only considered the evidence, not newspaper innuendo, we have been proven innocent.
Click below for a report by ITV News Political Correspondent Phil Hornby
Mr Bone's statement continued: "Please rest assured that I will continue to represent the people of Wellingborough and Rushden in Parliament, to the very best of my ability. Locally, I will be continuing my campaign for Rushden Lakes, for the reopening of Wellingborough Prison and the new urgent care centre at the Isebrook Hospital.
"Nationally, I will be holding the Government to account and making sure my constituents' interests are represented through the Listening Campaign. I will continue to campaign for lower immigration, an in/out EU referendum and the Government's long term economic plan.
"We are naturally delighted that this nightmare has now come to an end."
- Peter Bone has been the MP for Wellingborough since 2005
- Born in Billericay, Essex and went to Westcliff High School for Boys
- He served as a councillor in Southend for eight years
- Qualified as a chartered accountant