Gary DiPasquale is an Assistant State's Attorney and serves as the Grand Jury Prosecutor. DiPasquale is an associate of Bunk Moreland who assists the police in various Homicide cases.
The Grand Jury first appear in an unsuccessful summons of Frank Sobotka's union in connection with the investigation of the deaths of thirteen Jane Does found DOA in a shipping container.
DiPasquale then appears in Season 4 involving a summons of Old Face Andre with a perjury threat and with a court order to obtain DNA evidence from Stanfield Organization enforcers "Snoop" Pearson and Chris Partlow.
In Season 5, DiPasquale is prominent in obtaining depositions for the Clay Davis trial.
DiPasquale is later revealed to be responsible for selling sealed grand jury indictments to defense attorneys including Maurice Levy. Detective Lester Freamon concludes that DiPasquale is selling the indictments because amongst those working in the courthouse, DiPasquale's finances show that he took out a third mortgage on his home and has annual gambling losses that are more than three times his salary. Freamon convinces DiPasquale to cooperate as an informant, and has DiPasquale incriminate Levy in a single party consent telephone conversation. DiPasquale's actions are later covered up as part of a deal between Levy and prosecutor Rhonda Pearlman on charges against the Stanfield Organization.
The character is played by the series technical advisor Gary D'Addario, the shift lieutenant for the Baltimore Police Department's Homicide Unit featured in David Simon's Homicide: A Year on the Killing Streets book.