The account belongs to Menachem Stark and his business partner.
Stark was found dead Jan. 2 after he was seen on surveillance footage strong-armed into a van by two men.
The father of seven owned and renovated several buildings in Brooklyn but owed millions. Police are investigating the death.
The missing money comes from a $2 million account Stark's company was ordered to maintain to keep a 74-unit apartment building running after a 2009 bankruptcy declaration.
Court filings Tuesday show that $1.7 million was recently taken.
A court-appointed trustee has asked the judge to further investigate on behalf of Stark's creditors.
