When Andy was here for a visit....the US Navy's NCIS provided the Personal Security Detail (PSD).
One of the NCIS Special Agents evidently provided very close protection to Andrew....and upon his leaving gave him a Token of her esteem...that being what is known as a PSD Pin. If you notice the Secret Service and other PSD Teams....they all have a unique Lapel device (PSD Pin) that allows them to immediately identify one another as being on the same "Team".
At NCIS...that PSD Pin is ranked with the Badge, Credentials (Warrant Card you call them I think), and the Firearm in importance re custody, security, and safeguarding.
NCIS took no punitive action against her and within a few short months....she had been hired by the Secret Service and assigned to Jimmy Carter's PSD down in Georgia.