A grand jury is a legal body that is empowered to conduct official proceedings to investigate potential criminal conduct and to determine whether criminal charges should be brought. A grand jury may compel the production of documents and may compel the sworn testimony of witnesses to appear before it. A grand jury is separate from the courts, which do not preside over its functioning.[1]
What was that you said about "credibility"?
One shot, one kill........ It saves a lot of ammo!