The wife of disgraced money manager Bernard Madoff withdrew $15 million from a firm co-owned by her husband, including $10 million on the day before his arrest, a Massachusetts state official said Wednesday. Secretary of State William Galvin said Ruth Madoff withdrew the money in two steps from Cohmad Securities Corp., which is co-owned by Madoff. Galvin said she made withdrawals on November 25 and December 10 - the day before Madoff turned himself in on charges he swindled billions from investors. He cited reports produced by Cohmad as proof of the withdrawals. Galvin is trying to stop Cohmad from doing business in Massachusetts because of its relationship with Madoff.