fraduently taken the property

My father is 75 and mother is around 70 in age. My father retired from govt sector and mother housewife. I am writing in regard to their property in Gujarat. it happened when my sis family was financially weak. He already taken lots of loan on his own property later he had some more monetary help, he requested my father to take the loan on my father's property but simultaneously he ensured my father that the ownership will remain the same he just required the power of attorney and also only he will liable for loan. My father agreed as he had blind trust on him. My father retired in 1998 and this happened in 2003. He went to the registered office with my father and taken the signature on registry. that papers were in Gujarati and my father is not aware with this language. as he said that he requried only for loan purpose when the registered officer asked my father that he got the cheque he was under impression that officer is asking about the loan amount. he said yes. Now in 2011 we got to know as we got loan recall notice since then we are trying our best to get the property back but we have not got any good lawyers or no support even from police as every one said that the matter is too long and father already signed on registry so no use to go legal. One important point is he did forged signature on sale deed and based on this document his loan amount sanctioned. my parents are very old they cannot take this botheration. My jija ji's record is not that good he even left country and settle to Canada. he has lots of fraud in bank suprisingly he had taken loan in 2000, 2001 2002 and 2003 from same bank that is ICICI and not even a single loan paid. Sir/Madam, we are seeking good and positive advice and support. i can provide more details on this.