The records could have been seized either pursuant to a grand jury
subpoena or pursuant to a search warrant.
If they were seized pursuant to a search warrant, then no issue of grand
jury secrecy would apply, and I would assume your agency, or the
attorney who represents your agency, could simply contact the
appropriate federal prosecutor and either ask for copies of the records
or for the records themselves.
(It would not seem that the prosecutor would still need them, since you
say the consultant was convicted. Of course, they might be relevant to
an ongoing investigation of others, which takes me to the grand jury
If the documents were seized pursuant to a grand jury subpoena, the
prosecutor might argue that they are now protected by grand jury
secrecy, which means you would have to follow the procedures under Rule
6(e) of the Federal Rules of Criminal Procedure to get access to them
(that allows access for use in another criminal proceeding, essentially,
or for use in connection with a judicial proceeding if a court issues an
order to that effect). There is also an argument, a strong argument in
my view, that pre-existing documents produced to a grand jury are not
encompassed by secrecy. If the documents were produced to a grand jury,
the grand jury might still be using them (or might not, as I pointed out
Either way, it would seem that you or an attorney in your office could
contact the federal prosecutor responsible for the seizure of the
records and see if you can arrange to get them or copies of them.