In Re Grand Jury Subpoena

SELYA, Circuit Judge.

This appeal challenges the district court’s refusal to quash a grand jury subpoena. It poses questions about the attorney-client and Fifth Amendment privileges. After careful consideration, we affirm.

I. BACKGROUND

We begin with a brief account of the relevant facts. To preserve the confidentiality of grand jury proceedings, see Fed. R.Crim.P. 6(e), we use pseudonyms in place of the real names of the protagonists.

On August 24, 2009, a federal grand jury in the District of Maine directed a subpoe na to the custodian of records at the Doe Law Office, commanding production of:

A…