Those people's recollections comprise Sam's evidence and are relayed to the audience via flashback. In one of the film's final scenes in which Wade's killer is revealed via flashback to the murder, Sayles chooses to overlay music across the action, dousing all dialogue. In doing so, he lifts the dramatic level to epic status, emphasizing the violent action. Lone Star provides these answers, for they are the easy ones. Those that include the word RACE are more difficult, if not impossible.
All legends can.