When State Department spokesman John Kirby was unable to answer a question about Hillary Clinton’s email scandal on Monday, Fox News reporter Catherine Herridge helped him out.

Associated Press reporter Matt Lee asked Kirby if he knew when Cheryl Mills, Clinton’s former chief of staff, left the State Department. Kirby didn’t have an answer.

“When did Ms. Mills cease to be an employee of the State Department?” Lee asked.

“Uh, I do not have her exit date, Matt,” Kirby said, but was met again with a similar question.

“It was not when Secretary Clinton left, correct?” Lee asked.

“I don’t know for sure. I don’t know. You’re going to have to let me get back to you,” Kirby said.

Just then, Herridge offered to read a State Department letter, which showed that Mills maintained a Top Secret clearance even after she left the State Department.