Read the following scenario: John Doe walks into the bank to deposit his weekly paycheck. While there, one of his hairs falls off the back of his shirt and onto the floor. After depositing the money, he leaves and returns to work. About fifteen minutes later, the bank is robbed at gunpoint by a masked man who is about the same height and build as John Doe. The bank manager is asked to provide a listing of all customers who visited the bank in the past week. The plan to carry out the investigation included searching the crime scene for evidence. Upon doing so, one of the investigators finds the hair belonging to John Doe and tags it as evidence.
Answer the following questions:
Provide at least 3 reasons the hair evidence alone can't be used to pinpoint John Doe in the robbery.
What other evidence in the investigation could have been collected in the attempt to identify the bank robber? the perpetrator.
Explain why hair evidence is generally considered "class" evidence.