Last week, a report by The Hill‘s John Solomon revealed FBI Deputy Director Andrew McCabe gave Hillary Clinton’s email investigation “special” status.

According to The Hill, the FBI refuses to clarify what McCabe meant by labeling the Clinton probe “special”

The Hill reports:

McCabe’s Oct. 23, 2016, email to press officials in the FBI said the probe was under the control of a small group of high-ranking people at the FBI’s headquarters in Washington.

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“As I now know the decision was made to investigate it at HQ with a small team,” McCabe wrote in the email. He said he had no input when the Clinton email investigation started in summer 2015, while he was serving as assistant director in charge of the FBI’s Washington office.

“[The Washington office] provided some personnel for the effort but it was referred to as a ‘special’ and I was not given any details about it,” he wrote.