AIG CEO Ed Liddy has already testified once before Congress about his firm's starring role in the financial crisis. But it looks like he'll soon be doing so again.

Last week, Rep. Ed Towns -- who chairs the House Oversight Committee, which is probing the causes of the crisis -- sent a letter to Liddy inviting him to appear May 6th. Among the topics that Towns intends to cover, according to the letter: "What caused the downfall of AIG?" and "what has AIG done with its Federal financial assistance?"

It's not clear whether Liddy has officially confirmed his attendance, but a committee spokeswoman tells TPMmuckraker: "We expect to see Liddy on May 6th."

As we reported earlier this month, Towns has already written to Liddy requesting detailed information on AIG's use of PR firms to shape its public image, and specifically to undercut accusations made about the firm by former CEO Hank Greenberg.