Does the Government have a privilege to withhold from disclosing the identity of witnesses?

Does the government have a privilege to withhold from disclosing the identity of an informer? (MultiRegion, United States of America)

What is the government's argument in support of its contention that the federal government does not have the authority to compel pretrial disclosure of the identity of government witnesses? (MultiRegion, United States of America)

Does the federal rule of evidence govern privilege regarding privilege regarding a claim or defense for which state law governs? (MultiRegion, United States of America)

Does a federal court's refusal to order the government to accept a subpoena for a confidential informer produce the same effects as a decision not to disclose the identity of a confidential informant? (MultiRegion, United States of America)

Does a prosecutor have to vouch for a witness who is not a government witness? (MultiRegion, United States of America)

Does Section 6672 of the Federal Tax Code require an employer to withhold withholding from an employee, even if the employer pays withholding taxes to the employee? (MultiRegion, United States of America)

What is the test for making a jury consider whether or not to question two witnesses subpoenaed by the Government under Government cross-examination? (MultiRegion, United States of America)

What is the government's failure to disclose the identity of its informant? (MultiRegion, United States of America)

Does the Government have any case law that supports its argument that "the same analysis applies whether the witness is an expert or a lay witness"? (MultiRegion, United States of America)

When a witness asserts her Fifth Amendment privilege, what is the test for the privilege? (MultiRegion, United States of America)