Former MF Global chief executive Jon Corzine apologized “to all those affected” by the brokerage’s collapse Thursday as he told a congressional committee he doesn’t know what happened to $1.2 billion in missing customer funds.

Jon S. Corzine, MF Global Holding Ltd. (MFGLQ)’s chief executive officer, gave “direct instructions” to transfer $200 million from a customer fund account to meet an overdraft in a brokerage account with JPMorgan Chase & Co. (JPM), according to a memo written by congressional investigators.

Edith O’Brien, a treasurer for the firm, said in an e-mail quoted in the memo that the transfer was “Per JC’s direct instructions,” according to a copy of the memo obtained by Bloomberg News. The e-mail, dated Oct. 28, was sent three days before the company collapsed, the memo says. The memo does not indicate whether that phrase was the full text of the e-mail or an excerpt. O’Brien’s internal e-mail was sent as the New York-based broker found intraday credit lines limited by JPMorgan, the firm’s clearing bank as well as one of its custodian banks for segregated customer funds, according to the memo, which was prepared for a March 28 House Financial Services subcommittee hearing on the firm’s collapse. O’Brien is scheduled to testify at the hearing after being subpoenaed this week.

“Over the course of that week, MF Global (MFGLQ)’s financial position deteriorated, but the firm represented to its regulators and self-regulatory organizations that its customers’ segregated funds were safe,” said the memo, written by Financial Services Committee staff and sent to lawmakers.

Now I’m certain justice will be done….you just watch.