I received a grand jury subpoena what should i do?

In the District of Columbia, the grand jury is citizens serving on a jury to conduct legal proceedings, investigate potential criminal conduct, and determine whether criminal charges should be brought.    In DC, the grand jury may consist of sixteen to twenty-three members.  Twelve or more jurors must concur to return an indictment.    An indictment may be returned by less than twelve of the original grand jurors so long as the replacement jurors voting for the indictment are sufficiently informed of the evidence presented before their service began.