Which right(s) does the Sixth Amendment to the U.S. Constitution provide?

A criminal defendant has the right to be represented by counsel. The Confrontation Clause relates to the common law rule preventing the admission of hearsay, that is to say, testimony by one witness as to the statements and observations of another person to prove that the statement or observation was accurate. The rationale was that the defendant had no opportunity to challenge the credibility of and cross-examine the person making the statements.Criminal defendants have the right to a speedy trial. In Barker v. Wingo, 407 U.S. 514 (1972), the Supreme Court laid down a four-part case-by-case balancing test for determining whether the defendant's speedy trial right has been violated.