Canadian Criminal Procedure and Practice/Trials/Juries/Jury Selection

General Principles
Juries are to consist of "a representative cross-section of Canadian society". As such an accused has no right to demand that the jurors be composed of a certain race or ethnicity.

Jurors are presumed by their oaths to be impartial judges.

Any legal errors in jury selection will require a new trial. This includes errors of law by the judge or unreasonable exercise of discretion in managing the selection process.

Jury Vetting
Background checks can be done by the police to ensure eligibility under the Criminal Code and provincial jury Acts. If information is found such as a criminal record, it must be disclosed to the defence.

There is a limited ability for the police to give opinion on jury selection that does not need to be disclosed due to the lack of reliability of the opinion and underlying information such as community reputation.

Defence must disclose any information they know that may indicate a juror is partial or ineligible.

Excusing Jurors During Selection

 * See also Canadian_Criminal_Procedure_and_Practice/Trials/Juries

The judge must vet the jury for hardship exemptions before beginning with peremptory challenges or challenges for cause. To do otherwise effectively reduces the number of challenges that each side may have.

Challenge for Cause
Under section 638(1)(b), a party may challenge a juror "for cause", alleging that the juror may not be indifferent. The test is whether there is "a 'realistic potential' that the jury pool may contain people who are not impartial in the sense that even upon proper instructions by the trial judge they may not be able to set aside their prejudice and decide fairly between the Crown and the accused …"

The party challenging cause must establish that:
 * 1) a widespread bias exists in the community; and
 * 2) some jurors may be incapable of setting aside this bias, despite trial safeguards, to render an impartial decision.

These are the "attitudinal" and "behavioural" components to partiality.

The purpose of challenge for cause is to screen out potential biases in juries.

There is a presumption that jurors are capable of setting aside their views and biases in favour of impartiality between Crown and the accused and compliance with the trial judge's instructions.

The fundamental issue on challenges for cause is whether the accused can receive a fair trial pursuant to s. 11(d) of the Charter.

The judge has wide discretion to supervise the challenge.

Questioning
The questions should be “relevant, succinct and fair” and avoid invading "the privacy of prospective jurors in an attempt to probe personal feelings, opinions, and beliefs".

The ability to challenge opinions is limited. Often the questions are narrow enough only to be answered yes or no.