Chapter 5: Trial Flashcards
Witnesses: Preliminary issues
This section considers four preliminary issues relating to witnesses:
* Competence
* Compellability
* Opinion evidence and experts
* Privilege
1.1 Competence
When we talk about the competence of a witness, we simply mean whether the witness is permitted to give evidence to the court. In more formal language, a witness is competent if a person ‘may lawfully be called to testify’. Generally speaking, anyone is a competent witness. There are a few exceptions, ie a few instances where a witness, even if willing, is simply not competent to give evidence for one party or another
The defendant/accused
The defendant is not competent to be a prosecution witness. Where
there are multiple defendants, none of them can be prosecution witnesses for the other. The proceedings must be completed against any one of them so that they are no longer defendants in the case before they can be competent as witnesses for the prosecution. Defendants are, of course, competent to give evidence on their own behalf, and are competent
to give evidence on behalf of a co-defendant
Children and persons with a disorder or disability–
Age is not the determining factor of
whether a child is competent; the only test is whether the child can (1) understand questions, and (2) can give comprehensible answers. The test is the same for those operating with a disorder or disability.
Spouse/civil partner
A spouse or civil partner of a defendant is competent to give evidence for any party in the case
Deaf or speech impaired witness–
These witnesses are competent so long as they understand
the solemnity of taking the oath or affirmation. They can give evidence using interpreters, handwriting, sign language or any combination of these
1.2 Compellability
Some witnesses cannot be compelled to give evidence. Most can, but some cannot. The primary exceptions, ie those who are not necessarily compellable, are as follows:
1.2.1 The defendant
The defendant is not competent for the prosecution and so clearly can’t be compelled by the prosecution. The defendant may give evidence on D’s own behalf, but cannot be compelled to do so.
1.2.2 Children and persons with a disorder or disability
If competent, these witnesses are compellable.
1.2.3 Special rules
There are also rules for diplomats, sovereigns and bankers, but these are most unlikely to be examined.
1.2.4 Spouses/civil partners
Spouses and civil partners can be compelled to give evidence for their spouse or civil partner (ie
for the defence) but only for the prosecution if the offence charged against their partner is (PACE
s 80):
(a) Assault on, or injury, or threat of injury to that spouse or partner (ie domestic violence)
(b) Assault on, or injury, or threat of injury, to a child under 16
(c) A sexual offence against someone under the age of 16
(d) Attempts, conspiring, aiding and abetting any of the above
1.2.4 Spouses/civil partners
The logic is clear. Spouses and civil partners should not normally have to act against the interests of their partners, and this is generally accepted, unless the partner is inflicting domestic violence or abusing children. At that point, the courts can require spouses to attend to give evidence even if they do not want to do so. If they refuse to attend, they can be arrested, and if they refuse to
answer questions they can be held in contempt.
1.3 Opinion evidence and experts
There is a rule which is simple in expression (but quite hard in practice) which is that witnesses are,
generally speaking, called upon only to be witnesses of fact. Analysis of those facts is argued by advocates, and it is for the jury to ultimately decide on what inferences they draw and what
conclusions they should come to from the factual evidence provided. The courts will receive opinions from witnesses, but only if:
(a) The opinion is given in relation to commonplace occurrences about which the witness’s
perception appears relevant and proper; or
(b) If the witness is an expert.
1.3.1 Opinion evidence
There are so many different types of opinion that might be given by a witness, that it is not possible to have a list of matters that require (or do not require) an expert. A good example of an admissible perception of a non-expert is an opinion as to drunkenness.
Many people involved in crime or who are witnesses to it have consumed alcohol.
A witness could give factual evidence to indicate that a relevant person’s speech was slurred, pupils were dilated, or was walking unsteadily. In reality, though, witnesses would tend to simply say ‘the man was drunk’. This is, strictly, an opinion, and so would normally not be admissible
1.3.1 Opinion evidence
However, the law does not restrict such a statement in court on the basis that it is a way of expressing in summary the factual observations that the witness had made, and that the assessment of drunkenness is sufficiently commonplace a task that the witness’s perception would be received by the court. It remains best practice to focus questions in examination on the observable facts rather than only eliciting the opinion.
1.3.1 Opinion evidence
It remains best practice to focus questions in examination on the observable facts rather than
only eliciting the opinion. The list of other permissible non-expert opinions would be a truly huge list. Many of the items on the list would be under the heading of ‘identification’ as witnesses tend to combine facts (eg ‘the attacker wore a blue cardigan’) with opinion based on observations (eg ‘he
was young and male’).
1.3.1 Opinion evidence
Similarly, recognition of voice and handwriting are examples of opinions which are acceptable as having been derived from observed facts and represent an inference, the like of which is commonplace and will be received as admissible perceptions.
1.3.2 Expert evidence
Issues that would require expertise include more technical matters of science, medicine,
psychology etc. Doctors who have tended to a victim’s injuries may be tempted to give an opinion
as to whether the injury presented could have been caused in the way that was described by the
victim.
Occasionally the law specifies what level of expertise would be required before the court would
receive such an opinion. In this case (ie the opinion as to the likely cause of injury) it is clear that a
doctor, and specifically not a nurse, would be the only person with sufficient expertise to give
such evidence. Expertise can be acquired either through a course of study or by practical
experience (or a combination of both). It is for the party seeking to rely on the expert evidence to
establish that the expert has sufficient expertise
1.3.2 Expert evidence
Witnesses that are deemed as experts are treated slightly differently to other witnesses. They are regarded more as independent consultants than partisan witnesses, and experts are asked to
consider their role as being neutral and objective. Where there are multiple experts in a case, they are encouraged to meet to establish the matters on which they agree and disagree, and to narrow the issues between them and to explain the basis on which any disagreement is founded. Experts should always be clear in defining the boundaries of their expertise and to indicate if the questioning is straying into areas in which their expertise may be less clearly relevant.
1.3.2 Expert evidence
As a matter of good practice, an advocate should not ask an expert to give an opinion directly on
the ‘final’ issue in the case. So if, for example, the question for the jury is whether the defendant caused death by dangerous driving, one should not ask (without prior leave) the witness ‘Is it your opinion that the defendant caused this death by dangerous driving?’. Opinions as to the component parts of the driving would be better (eg giving an opinion as to the speed of the car by reference to skid marks). The jury would then conclude the final question for itself.
1.3.2 Expert evidence
The jury is not obliged to accept expert evidence, even if it is not contradicted. In every case where there is an opinion that has not been directly contradicted, the judge has to decide how to sum
the case up to the jury and, if there is other evidence that tends to a conclusion which is not the
conclusion of the expert, the jury would still be empowered to prefer the alternative conclusion. Only in cases where the expert’s opinion and all the other evidence leads inevitably to only one conclusion should the jury be directed to accept the opinion as correct
1.4 Privilege
We will consider two main forms of privilege:
* Against self-incrimination; and
* Legal professional privilege which can be sub-divided into:
- Litigation privilege; and
- Advice privilege.
1.4.1 Against self-incrimination
There is a general principle (under the common law) that courts will uphold a witness’s right (and we are talking about witnesses other than the defendant) to refuse to answer questions or disclose documents if to do so would make that person liable to incriminate themselves. It is
important to note that the person cannot claim privilege to protect another person, even a spouse, and cannot be invoked in order to protect against possible liability in a civil court.
1.4.1 Against self-incrimination
A defendant’s (ie someone ‘charged in criminal proceedings’) right to refuse to answer questions was removed from the common law by the Criminal Evidence Act 1898, and is now governed by the rules on ‘adverse inferences’, dealt with in separate sections.