It is for you to determine whether Mr McCartney has been identified as the person who robbed Mr Huynh. Before you can convict him, you must be satisfied of that identification beyond reasonable doubt. However, before you make that decision, I must give you some warnings about the evidence. To help you to understand the reason why I must give you these warnings, I will briefly explain the three stages that are involved whenever an identification is made.
First, the witness must have observed someone committing the crime. Second, the witness must have retained an image of that person in his or her mind until the time of the identification. Third, the witness must have later seen the accused (or a picture of the accused in this case) and identified him as being the person seen committing the crime.
Difficulties can arise at each of these stages. In relation to the first stage, the circumstances in which the observation was made may not have been ideal. For example, there may have been limited time for the observation. The lighting may have been poor or the person he saw may have been - and you know the circumstance in this case of course, what is put by Mr Edney and I will remind you of it, the hat and the glasses, that kind of thing.
In relation to the second stage, the witness might have difficulty remembering what the person he saw looked like, especially if that person was only seen fleetingly or there was a long time before the identification took place. That may lead difficulties at the third stage in accurately identifying the offender from a selection of photographs.
Because of these difficulties, identification evidence is potentially unreliable. Yet despite this potential unreliability, witnesses often claim that they are sure of their identification. Because they believe in their identification they appear to be honest and convincing witnesses, however there is a difference between honesty and accuracy.
Even though witnesses may honestly believe they have identified the accused, they may be mistaken, so you must not assume that just because a witness is honest, his or her evidence is reliable. You also should not assume that because in this case there are two different identifications, that the identification evidence is necessarily reliable.
Experience has shown that a number of witnesses can all be mistaken in their identification. This is because the same uncertainties I have just been telling you about can affect more than one witness.
It is therefore important that you take special care before accepting identification evidence as true. The experience of the law has shown that people have been wrongly convicted because even respectable and honest witnesses have given mistaken evidence confidently identifying them as the offender.
Because of this risk of unjustly convicting the wrong person, identification evidence must be treated with great care. I am not saying that you should not rely on identification evidence. However, to avoid a possible miscarriage of justice, you must take the potential unreliability of identification evidence into account in determining whether you accept such evidence and if you do accept it, in deciding what weight to give to that evidence.
You should examine all identification evidence with special care and be especially cautious before accepting such evidence as correct and relying on it. If, after careful examination of the identification evidence, and in light of all the circumstances and other evidence given in the case, you are satisfied beyond reasonable doubt that the accused was correctly identified, then you can use the evidence in reaching your verdict. Having given you that general warning, that general warning obviously applies to both identifications, the Senior Constable and Mr Huynh.
I want to look at some of the specific factors that affect the reliability of an identification and there are three factors that you must examine when considering identification evidence: The circumstances in which the offender was observed, the characteristics of the witness who gave the evidence and the way in which the accused was identified, and you must examine each of those factors closely, along with any other relevant factors when deciding whether to accept the identification evidence.