Eyewitness Identification of the Defendant (Note added 2016 and revised 2017) is a legal procedure in which a witness is presented with a lineup of individuals and asked to identify the defendant. This process can be done through both physical and photo lineups, with the latter being the more common. A physical lineup may involve the witness being asked to observe a group of individuals and select the person they believe committed the crime. A photo lineup may involve the witness viewing photographs of people who could have been involved in the crime and selecting the one they believe committed the crime. There are two main types of Eyewitness Identification of the Defendant (Note added 2016 and revised 2017): simultaneous lineups and sequential lineups. In a simultaneous lineup, all the individuals are shown to the witness at the same time. In a sequential lineup, the witness is shown each potential suspect one at a time. Both types of lineups can be used in physical and photo lineups. The Eyewitness Identification of the Defendant (Note added 2016 and revised 2017) procedure is an important part of criminal proceedings and is heavily relied upon by law enforcement. It is important to note that there have been cases of erroneous eyewitness identification, which can lead to false arrests and convictions. As such, strict protocols have been established to ensure that the process is conducted in a fair and reliable manner.