Joanna Dennehy, 31, who has pleaded guilty to murdering three men and the attempted murder of two others in England, is seen stretching out her pierced tongue in a wild smile in what authorities say are photos taken only minutes before she selected her next two victims.Photos capturing the smiling face of a deranged serial killer just before she knifed her fourth and fifth victims in a bloodlust frenzy in England last spring were shown before a court this week. Joanna Dennehy, 31, is seen stretching out her pierced tongue in a wild smile in what authorities say are self-taken...