Ruth Madoff pulled $10 million on December 10, the day before her husband was arrested and charged with running a global investment fraud, and $5.5 million on November 25, according to Massachusetts Secretary of State William Galvin.

Galvin did not file any charges against Ruth Madoff. The disclosure of her withdrawals came in reports produced by Cohmad Securities, a firm co-owned by Bernard Madoff that had funneled millions of dollars from its clients to Madoff.

Bernard Madoff, 70, is the only person charged so far in the alleged scam that has hit banks, charities, wealthy investors and celebrities worldwide.

Madoff told authorities he acted alone in confessing to the fraud, prosecutors have said.

Legal experts, however, have said they are skeptical that such a massive fraud could have been pulled off by one person.

Federal prosecutors, the U.S. Securities and Exchange Commission, various state authorities and a court-appointed trustee liquidating the Madoff firm are all investigating.

Lawyers for the Madoffs could not immediately be reached for comment on Wednesday.

Galvin said that for years, Cohmad Securities received monthly payments that totaled $67 million — the bulk of its total income — for “professional services”, “brokerage services” and “fees for account supervision” from Madoff.

Galvin’s office is trying to suspend Cohmad’s state license so that it can no longer act as a broker in Massachusetts.

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Bernard Madoff is under house arrest at his luxury Manhattan penthouse.

The U.S. Attorney’s Office in Manhattan bought more time to probe the complex Madoff case on Wednesday, with the government and defense lawyers agreeing to extend the deadline by 30 days to bring an indictment or secure a guilty plea. A preliminary hearing is scheduled for March 13.

An indictment is a necessary step if Madoff is ever to stand trial on criminal fraud charges.

The delay means that the government can continue to build its case or discuss ways with Madoff’s lawyers to resolve the case. A similar extension in the case was granted in January.

Ruth Madoff, the co-author of a kosher cookbook, has drawn scrutiny from federal prosecutors who had tried unsuccessfully to have her husband’s bail revoked and jail him immediately. They said that the couple sent more than $1 million worth of valuables to relatives and friends in violation of a court order.

Madoff, a former chairman of the Nasdaq stock market and once a respected money manager, is accused of running a long-standing Ponzi scheme in which money from new investors was used to pay withdrawals and investment gains of earlier investors.

Other people and firms under scrutiny include hedge funds and other investment managers who placed client money with Madoff over the years.

New York Attorney General Andrew Cuomo told reporters on Wednesday that well-known hedge fund founder Ezra Merkin is cooperating with a probe by his office.