Washington( CNN) Few people inside Donald Trump’s orbit are more important than Keith Schiller, the President’s longtime guard who has risen from part-time hired muscle to administrator of Oval Office operations.

That status was cemented on Tuesday when the former New York Police Department officer hand-delivered a letter from the President firing FBI director James Comey, entering the FBI headquarters with a manila folder and to leave it.

Schiller, a White House official told CNN, went to the headquarters expressly to fire Comey, even though the FBI is currently in the middle of an investigation into Russia’s meddling in the 2016 election and ties the hackers may have had to Trump associates.