am i within the statue of limitation for a fraud case?

After father died in 9/2010, I found investment account with father's and sibling name. his will was destroyed. After inquiries, in 2011 learned the account was opened online with incorrect information and father's signature was a copy. Sibling fraudulently added his name and immediately transferred account into only his name. In 2012 received further evidence of fraud after hiring attorney for representation in surrogate court. When deposed in 12/15 sibling submitted more evidence of fraud because father's signatures did not match. When does the six year limitation begin? can I now go into civil court on fraud charges?.