O'Leary cannot believe the financial collapse that has took them to the brink of administration.
"I would support an inquiry into what happened at this club," he said.
"At that time we had the Champions League semi-final, a sell-out of course, and a big sponsorship deal with Nike and I was never aware of any financial problems.
"I let the financial people handle things because that was their strength, I thought.
"I believed that a couple of people were overseeing things and that doesn't appear to have been the case.
"I have an inkling about what went on but I'm not prepared to say at this stage.
"I will say I would support an inquiry because I would love to know just where the money went."