According to this excerpt it is in DC.

ANd I would think the attorney/client privilege would prevent testimony
by Fischer's lawyer.

RL

Posted 3/8/2005 7:09 PM

Bobby Fischer under investigation for possible money laundering
PHILADELPHIA (AP) - A federal grand jury in Washington, D.C., is
investigating possible money-laundering charges involving former chess
champion Bobby Fischer, who is already wanted for violating U.S.
economic sanctions, one of his lawyers said.
"This is a pure tactical and propaganda ploy," attorney Richard
Vattuone said.

Federal prosecutors issued a subpoena last week to a second lawyer,
Joseph Choate Jr., who once represented Fischer, ordering him to appear
March 17 before the grand jury to discuss a "possible violation" of
money-laundering statutes.

Choate declined to be interviewed about the subpoena, a copy of which
Vattuone provided to The Associated Press.