The most important question that needs to be asked to a potential witness when police arrive on a crime scene during a multi-witness event is “who did you speak to prior to police arrival”. This is important due to the fact that witnesses will converse with each other prior to police arrival at the scene and some witnesses become unsure of what they had observed. When specific details are implanted through conversation by a dominant witness, believing their version is correct, the witness may alter what they originally believed to be fact. This is called the “Dominant Witness Theory”. By failing to trace this information flow from witnesses, there is a good chance investigators or officers may follow false or misleading information which ultimately could target innocent individuals as suspects.