 Investigators are also required to have a working knowledge of the Criminal Code of the Commonwealth of Virginia, the Criminal Code of the State of Maryland, and the Criminal Code of the District of Columbia since their investigations may require Investigators to obtain arrest and/or search and seizure warrants in those jurisdictions.Likewise a close working relationship with the U.S. Attorney's office and/or state and local prosecutors is required in order to prepare investigative reports, testify before grand juries, in Federal, military, state or local court in order to achieve a successful prosecution.PPD CI/IAD routinely work closely with most all federal, military, state and local law enforcement agencies including the Federal Bureau of Investigation, the United States Secret Service, and the individual service investigative activities.