The Truitt Law Firm has a strong track record representing plaintiffs and defendants in a broad spectrum of personal injury lawsuits. Call 985-273-0900. Call For A Free Consultation
Thus, a person called to testify before Congress can refuse if they believe the government could use the testimony against them in criminal proceedings. To render the protections against self-incrimination ineffective, Congress can provide immunity from criminal prosecution.
1 A witness can, at any time, refuse to answer a question by claiming protection under the Fifth Amendment.  The person testifying is the defendant in a criminal case: This is an extension of the protection under the Fifth Amendment. Criminal defendants can never be forced to testify.