The mental processes in the identification of strangers are complex processes that demand more than basic memory of facts. However, three main mental processes account for mistakes in identifying strangers. These include acquisition, storage, and retrieval. Acquisition refers to the process of perceiving and collecting information. Several factors such as race, viewing conditions and eyesight of the eyewitness, may influence the mental process of acquisition. Storage on the other hand refers to safe and accurate custody of the acquired information. Even though information may be accurately acquired, the details face competition in a person’s memory with other information that an eyewitness continues to acquire after the incident. Retrieval refers to the capacity to accurately avail and present information that is acquired and stored. Many circumstances have been pointed out as having significant roles to play in the accuracy of perceptions in identifying strangers. These include personal bias and expectation, problems in perception, discussions with other witnesses, age, health and stress.