NEW YORK -LRB- CNN -RRB- -- The wife of accused swindler Bernard Madoff pulled $ 15.5 million out of a Madoff-related brokerage firm in Massachusetts in the weeks before his arrest , authorities there disclosed Wednesday . Bernard Madoff is under 24-hour house arrest in his Upper East Side luxury apartment . The withdrawals by Ruth Madoff took place in November and December , according to a complaint filed by state regulators against Cohmad Securities , a firm they said was `` intertwined '' with Madoff 's New York-based company . The regulators say Cohmad has refused to provide information about its ties to Madoff , who is accused of running a Ponzi scheme that may have cost investors up to $ 50 billion . Daily wire transaction reports show Cohmad was aware of transfers to and from Madoff-related accounts , the filing states . `` For example , the few reports produced by Cohmad show that Ruth Madoff withdrew $ 5.5 million on November 25 , 2008 and withdrew $ 10 million on December 10 , 2008 , '' investigators said . Bernard Madoff , 70 , was arrested December 11 and is currently under house arrest in his Manhattan luxury apartment . He faces one charge of securities fraud in connection with an international scheme that has cost some investors their life savings and could face up to 20 years in prison and a $ 5 million fine if convicted . In January , prosecutors tried to revoke his $ 10 million bail after he mailed more than $ 1 million worth of diamond-studded jewelry to friends and family , a move they said showed he was trying to move assets out of government hands . But a judge ruled Madoff was neither a danger to the community nor a flight risk . Prosecutors and Madoff 's lawyers have agreed for a second time to push back the deadline for an indictment or probable cause hearing for the former investor , sources close to the case said Wednesday . The previous deadline of Wednesday -- which was itself a delay -- has now been moved back another 30 days . Madoff and the Securities and Exchange Commission already have agreed to a partial civil judgment against the disgraced investment manager , one that could eventually force him to pay fines and return investors ' money . Under the terms of the deal , Madoff will keep a previously reached agreement to freeze his assets and not to violate any other securities laws , but it does not require him to admit or deny any allegations . CNN 's Allan Chernoff and Amy Sahba contributed to this report .