All of the comments in this thread assume he was being investigated for his acquisition of comically large amounts of cash and commodities that he presumably left the building with in big bags with a dollar sign on them. They ignore the open secret that the CIA is cartoonishly out of control has been little more than a massive organised crime syndicate that happens to be on the government payroll for 20 years.

In all likelihood, his taking more than forty million dollars wasn't the suspicious behaviour that set him to being investigated. It's right there in the charge sheet. He was being investigated because payroll noticed he was fraudulently claiming leave that he wasn't entitled to. There's no routine oversight on who they're bribing with actual gold. There's still routine oversight on their payroll and HR practices. That led to them actually checking his resume properly, and when that was shown to be bullshit, only then did they actually look at what this guy was doing.