Zachary Davis (July 27th, 1997 - ) is a sledgehammer murderer, he is a 19 year old male who was arrested for the murder of his mother Melanie Davis with a sledgehammer, hitting her at 12 times in the progress and he just laughed inappropriately and sets the house on fire by trying to kill his 16 years old brother Josh Davis in August 10, 2012. He was sentenced in prison for 71 years. In 3 years later, in the Dr. Phil show, he interviews him that he convinced about the murder of his mother. He also speaks in a low, flat, distinctly monotone voice and affected after his father died in amyotrophic lateral sclerosis, or ALS, in 2007. The officer thinks the voice of his father Chris Davis told him to kill his mother and brother because they deserved it. Zachary also states that he said "I would probably kill Josh with sledgehammer too." He asked the officer. He is one of the worst teenagers in the Sumner county.
- Dr. Phil Show (May 22, 2015 episode)