You are clutching at straws on behalf of Altaf Hussain. The guy has been caught with his pants down. Even if he was arrested for 9 minutes, he still was arrested, which means that the police had something which allowed them to get a warrant for his arrest. OTherwise if it was just questioning, they could have done it at his home.
Its not just about the cash found at his home. His personal account also holds tons of money on which he was questioned. And frankly, he doesnt have any way of proving it was legitimately acquired.
If he claims that all this cash was party donations, then it has to be accounted for, receipts issued, deposited in a bank, and taxes paid. And if the money came from Pakistan, then the method of how it was sent is brought into question. And Im sure MQM was not sending it through Habib Bank. They were sending it through hawala, which makes it a money laundering issue.