A juvenile judge decided Tuesday that a 15-year-old who allegedly killed his mom with a sledgehammer and left his brother to die in a burning house will be tried as an adult.

The details in Zachary Davis' murder case were so gruesome that the Sumner County Juvenile Court Judge decided there was nothing that the juvenile system could do for the boy, WTFV reported.

"It was a horrific murder and the judge made the observation that it was a savage murder and that Zachary Davis could not be handled in the juvenile court," said county District Attorney, Ray Whitley.

An arrest affidavit obtained by WKRN states that on the night of Aug. 10, Davis bludgeoned his mother, Melanie, to death as she slept in her bed. He then allegedly went upstairs and started a fire in the family's game room, leaving his sleeping older brother to burn inside. His brother made it out alive.

Davis was arrested a short distance from his Hendersonville, Tenn. home, reportedly with a notebook containing a confession to the crime.

He was charged with first-degree murder, attempted first-degree murder, and aggravated assault after a mental health evaluation found he was fit to stand trial.

His attorney, Randy Lucas, called his client the real victim in a statement released on Tuesday.

"As devastating as is the senseless loss of a life, this case is even more tragic for the simple fact that Zack is also a victim here," Lucas wrote. "After Zack Davis' father died, in his presence, of a degenerative illness, being moved and isolated from extended family, Zack sent up every possible red flag a nine-year-old is able to articulate that he was depressed, disturbed, and sliding into a chasm of despair and frustration. And yet, he was failed at every turn by the school system, the child welfare system, the family and society.

"Zack Davis is truly lost in the system," he added.

Loading Slideshow...
  • Thomas Washburn

    Washburn was a 54-year-old kindergarten teacher in Mesa, Ariz. when he allegedly punished a crying 6-year-old girl by taking off her shirt and leaving her half-naked for 10 minutes. The student started crying because Washburn had allegedly shouted at the two dozen kids in his class in January, 2014.

  • Delbert Huber

    Delbert Huber, 82, shot Timothy Larson, a local teacher, after their argument over a missing $50 and farm equipment escalated. He pleaded guilty to second-degree murder.

  • Shirley Nunez

    Oregon woman Shirley Nunez, 47, was charged with attempted murder for allegedly running over her cop-husband with a Ford F-150 after pointing a gun at a woman he suspected him of cheating on her with.

  • Randy Zipperer

    This Floridian was so angry at his brother during an argument about missing macaroni and cheese that he allegedly stabbed him. Or, as Zipperer allegedly told cops, "I poked him a little with the knife, but I didn't mean to." <a href="http://www.huffingtonpost.com/2013/06/13/randy-zipperer-stabs-brother-macaroni-and-cheese_n_3436240.html" target="_blank">Read the whole story here.</a>

  • Deborah Burns

    Burns allegedly threw a kitchen knife at her boyfriend, cutting his abdomen, <a href="http://www.huffingtonpost.com/2013/05/09/deborah-burns-fart-in-face-knife-fight_n_3244946.html?1368113168" target="_blank">because he farted in her face. </a>

  • Jillian Martone

    <a href="http://articles.sun-sentinel.com/2012-11-21/news/fl-boca-first-date-arrest-20121121_1_kitchen-knife-apartment-window-boca-raton-police" target="_hplink">Martone is accused</a> of punching a man and threatening him with a knife after he refused to call her his girlfriend following their first date.

  • Holly Solomon

    <a href="http://www.myfoxphoenix.com/story/20073992/2012/11/12/obamacare-dv-case" target="_hplink">Solomon is accused</a> of running over her husband in her SUV because he didn't vote in the 2012 election.

  • Allen Casey

    Casey was accused in October, 2012 of hitting his boyfriend with a plate for listening to <a href="http://www.news4jax.com/news/Police-Alanis-Morissette-music-leads-to-domestic-violence/-/475880/17008390/-/bum7kk/-/index.html" target="_hplink">nothing but Alanis Morissette music.</a>

  • Charlene Idelle Hunziker

    <a href="http://westdesmoines.patch.com/articles/woman-jailed-after-allegedly-telling-west-des-moines-police-they-couldn-t-arrest-her-because-she-s-a-republican?ncid=searchuspatc00000002" target="_hplink">Hunziker is accused</a> of causing a disturbance at a P.F. Chang's in West DDes Moines in October, 2012. She allegedly told police they didn't need to be there because "she was a Republican," according to a police report.

  • Zachary Davis

    This 15-year-old boy will be charged as an adult in the sledgehammer murder of his mother in August, 2012. Davis allegedly killed his mother and then lit his home on fire in an attempt to kill his older brother while he slept. <a href="http://www.huffingtonpost.com/2012/09/19/zachary-davis-sledgehammer-adult_n_1896715.html?1348067169&ncid=edlinkusaolp00000009" target="_hplink">Read more</a>

  • Disturbed Sleeper

    Justin Michael Byars, 21, allegedly was so unhappy about being woken up that he assaulted the guy in the head who did it, punching the man in the head before throwing him into a fish tank. <a href="http://www.huffingtonpost.com/2012/09/26/justin-michael-byars-assault-woke-up-sleep-aquarium_n_1916088.html?utm_hp_ref=weird-news" target="_hplink">Read the whole story here.</a>

  • Lluvia Rodriguez

    Rodriguez is accused of <a href="http://www.click2houston.com/news/HPD-Woman-bites-sister-s-nose-off/-/1735978/16552418/-/11pwfo7z/-/index.html?hpt=ju_bn5" target="_hplink">biting her sister's nose off</a> during a fight. The nose was successfully reattached.

  • Couple's Orgy Goes South

    Tina Norris and James Barfield, a Florida couple, had an orgy at their house in August 2012. Mid-way through, they apparently agreed that they didn't much care for orgies. They started beating on one another, and not in the good way. Both were charged with domestic battery and locked up.

  • Sheriff officers examine crushed cruisers at the Orleans County Sheriff's Department in Newport, Vt., Thursday, Aug. 2, 2012. Authorities say 34-year old Vermont farmer Roger Pion, angry over a recent arrest last month on charges of resisting arrest and marijuana possession, used a large tractor like a monster truck, destroying seven police cruisers. (AP Photo/Northland Journal, Scott Wheeler)

  • Robert Gernot

    Germot was accused of threatening his neighbor by saying, "When I get done taking a s--t, I'm gonna kick your f---ing a--!"

  • Christopher Dabney

    Christopher Dabney, 22, allegedly attacked a US Army veteran in a wheelchair on Halloween, knocking the 35-year-old out of his chair. Dabney reportedly believed that the victim's Army uniform--and wheelchair--were fake, and was angry at what he perceived as an offensive Halloween costume. <a href="http://www.huffingtonpost.com/2012/11/02/daniel-priotti-veteran-assault-christopher-dabney_n_2063949.html?ir=Weird+News&ref=topbar" target="_hplink">Read the whole story here.</a>