Quoting
epowerfan
For more than 100 years, courts in the United States have held that, according to the United States Constitution, a criminal defendant's right to appear in person at their trial, as a matter of due process, is protected under the Fifth, Sixth, and Fourteenth Amendments.
A 2004 ruling by the Arizona Supreme Court:
A voluntary waiver of the right to be present requires true freedom of choice. A trial court may infer that a defendant's absence from trial is voluntary and constitutes a waiver if a defendant had personal knowledge of the time of the proceeding, the right to be present, and had received a warning that the proceeding would take place in their absence if they failed to appear. The courts indulge every reasonable presumption against the waiver of fundamental constitutional rights. State v. Whitley, 85 P.3d 116 (2004)
Although*Congress*codified this right by approving Rule 43 of the Federal Rules of Criminal Procedure in 1946 and amended the Rule in 1973, the right is not absolute.
Rule 43 provides that a defendant shall be present: at the arraignment, at the time of the plea, at every stage of the trial including the impaneling of the jury and the return of the verdict and
at the imposition of sentence.
The following exceptions are included in Rule 43: the defendant waives his right to be present if he voluntarily leaves the trial after it has commenced, if he persists in disruptive conduct after being warned that such conduct will cause him to be removed from the courtroom, a corporation need not be present, but may be represented by counsel, in prosecutions for misdemeanors, the court may permit arraignment, plea, trial, and imposition of sentence in the defendant's absence with his written consent, and the defendant need not be present at a conference or argument upon a question of law or at a reduction of sentence under Rule 35 of the Federal Rules of Criminal Procedure.
Several U.S. Supreme Court decisions have recognized that a defendant may forfeit the right to be present at trial through*disruptive behavior,*or through his or her voluntary absence after trial has begun. In 1993 the Supreme Court revisited Rule 43 in the case of*Crosby v. United States. The Court unanimously held that Rule 43 does not permit the trial*in absentia*of a defendant who is absent at the beginning of trial.