Brian Miller, inspector general for the General Services Administration, has asked the Justice Department to consider bringing "possible criminal charges" aganst the officials involved in the lavish Las Vegas conference.

"The U.S. attorney's office for the District of Columbia would neither confirm nor deny the existence of an investigation," according to the Federal Times, which reported Miller's referral based on "a congressional source familiar with the investigation."

GSA employees spent over $800,000 on a conference in Las Vegas and made a rap video spoof joking, during the conference, about the lack of oversight for their spending. They also cracked jokes at President Obama for wanting "a press event" highlighting his green energy policies.

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Since news of the conference surfaced, the inspector general has also reported that GSA employees took a five-day trip to Hawaii on the taxpayer dime for a one-hour ribbon-cutting ceremony.

The conference, ironically, took place just months after Obama quoted then-GSA head Martha Johnson to define the ideal work culture in the federal government.