Vouching for your witnesses is forbidden even in an adversarial trial where there is opposing counsel to counter it and a judge to instruct the jury to disregard it. Vouching in a federal Grand Jury is outrageous. It's hard to imagine an AUSA who doesn't understand that. This is cause to dismiss.
William Snyder
AUSA Sheri Mecklenburg: "I would never ask you to charge somebody if I didn't think there was probable cause … I don't charge people unless I'm absolutely sure."
Jon Seidel
DEVELOPING: Read the grand jury transcripts that tanked the controversial 'Broadview 6' case, via @chicago.suntimes.com: chicago.suntimes.com/immigration/...
chicago.suntimes.com
The case revolved around a September protest and collapsed last month amid revelations of apparent prosecutorial misconduct during the grand jury proceedings.