It is hard to believe that Briggs will not be able to get a Manhattan grand jury full of liberal democrats to vote to indict Trump. They were probably ready to indict Trump before they heard any evidence.
The only evidence they hear is what Briggs chooses to present to them. The only witnesses are ones he called, there is no cross examination, and no right of rebuttal by the accused. He even tells the grand jury what the law is. That is why there is an old saying that a DA can get a grand jury to indict a ham sandwich.
Current laws of Evidence contradict Bragg’s actions.
EXCULPATORY evidence MUST be presented.