One of the most crucial tasks for a criminal trial lawyer is choosing a fair and impartial jury. In Florida, most criminal jury trials consist of six jurors except for capital cases where the jury is expanded to twelve citizens chosen from those who possess valid Florida driver licenses.
The term used for the jury selection process during which the lawyers are allowed to question prospective jurors is called "voir dire" or "to speak the truth". The task of the criminal defense attorney in this stage of the criminal trial is to determine which of the prospective jurors are capable of judging the case on its merits ie. the facts of the case. Such factors as predispositions of one sort or another can be revealed if the voir dire is effective. The attorney has a right and a duty to challenge jurors who appear to be partial, prejudiced or are not fully truthful in their answers. Such nonverbal factors such as body language, tone, and appearance also play a role in the attorney's determination of whether the juror should be challenged for fitness to serve on a particular case.
In Loftin v. Wilson, 67 So. 2d 185, 192 (Fla. 1953), the court, quoting Pearcy v. Michigan Mut. Life Ins. Co., 111 Ind. 59, 12 N.E. 98 (1887), held:
"The examination of a juror on his voir dire has a two fold purpose, namely,
to ascertain whether a cause for challenge exists, and to ascertain whether
it is wise and expedient to exercise the right of peremptory challenge
given to parties by the law.
It is the duty of a juror to make full and truthful answers to such
questions as are asked him, neither falsely stating any fact, nor
concealing any material matter, since full knowledge of all material and
relevant matters is essential to the fair and just exercise of the right to
challenge either peremptorily or for cause. A juror who falsely
misrepresents his interest or situation, or conceals a material fact
relevant to the controversy, is guilty of misconduct, and such misconduct,
is prejudicial to the party, for it impairs his right to challenge."
Normally, the attorney has three challenges in which he may ask the court to remove the prospective juror. Also, two alternate jurors are selected in case of illness or other unforeseen circumstances arise during trial.
A subsequent guilty verdict may be challenged after the fact if it is revealed that the juror was not truthful and his or her lack of honesty
adversely affected his judgment and led to the guilty verdict.