Did a Secret Service agent wear a fake hand to inauguration?

Nearly a week after Donald Trump's inauguration, social media is still fixated on a certain figure who walked during the parade — a Secret Service agent.

The agent caught the attention of TV and online parade viewers, who claim his hand was not moving.

Some say it was a prosthetic hand known as a "tactical fake arm," which led many to believe his real hand was holding a gun tucked inside his jacket.

See more photos of the day:

However, some have debunked the theory, citing certain moments when the agent appears to move his hands and later closes the limousine door. His fingers are clearly moving, and he was also photographed buttoning his jacket with both hands.

Security around Trump has been air-tight since the campaign. After moving into the White House, the president has maintained a key member of his private security team, retired New York City police officer Keith Schiller.