False Witness - S1.E7

Nick's feelings of responsibility for the death of a man he was supposed to protect in a "sting" operation causes him to lie about actually seeing the murderer pull the trigger. In addition to the problem of having to appear in court to testify in broad daylight, Nick's desire to see justice done struggles with his conscience. He calls up memories of an incident from the past in which a woman lies in court, condemning to death a man Nick knows to be innocent, since he saw his fellow vampire Janette commit the crime.