text: When someone gets caught doing wrong by the police, the cops do not just ask one person what had happened, they ask multiple witnesses. They do this because if they were to ask one person what had happened then they would most likely be missing information. No one person knows everything. The person that they ask could have missed part of what happened, or forgot a key detail that another person might remember. So if you were to go ask one person for advice, you would need to be careful because the person that you ask could have forgotten an important detail.