This week, in the portion of the Georgia grand jury report that was released by Judge McBurney, we learned that the grand jury suspects that multiple witnesses perjured themselves while giving testimony.There is one thing I can assure you about grand juries and the prosecutors who run them: they hate, and I mean hate being lied to. A grand jury can tell when lies have been told because they listen to the testimony of multiple witnesses and have access to all the documentary evidence, and they can compare one person’s testimony with the testimony of others questioned about the same subjects.

Source: A cover-up fit for a coup: Georgia grand jury says witnesses in Trump probe lied | Salon.com