Hi Philip
  I'm sorry, but your question is outside the scope of this forum.  You need to understand the process, and you can find details on the government website 
www.gov.uk/benefit-fraud. If you follow the links on that page it will tell you how and where you can get legal help.   You should also try and find yourself a specialist welfare advisor. You can do this here 
advicelocal.uk/ You also need to make sure you have copies of any relevant records. 
 BIS