Carly Gregg, 15, is fighting murder charges with an insanity defense after she shot her mother AshleySmylie dead and attempted to kill her stepfather in their Mississippi home back in March.
Chilling video showed a Mississippi teen murder suspect's nonchalant ... up to and following the alleged murder of her mom, AshleySmylie, on March 19. Gregg was 14 when she allegedly used a ...