ALEXANDRIA, Va. —

The Justice Department acknowledged in court Wednesday the grand jury that charged former FBI Director James Comey was not presented with a copy of the final indictment, a concession that may further imperil a prosecution already subject to multiple challenges and demands for its dismissal.

The revelation is the latest indication of a troubled presentation of the case to the grand jury by an inexperienced and hastily appointed U.S. attorney named to the job just days earlier by President Donald Trump.

Concerns about the process surfaced earlier in the week when a different judge in the case said there was no record in the transcript he had reviewed of the grand jury reviewing the indictment that was actually presented against Comey.

Lindsey Halligan, the interim U.S.

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