In 2006, at age 14, Cody Posey murdered his father, stepmother and stepsister on the Chavez Canyon Ranch owned by ABC newsman Sam Donaldson. Posey was sentenced to a juvenile facility, and a few short years later, on his 21st birthday, he was released. A look at the case in photos.

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More than two months after applying, Alabama teenager Autumn Wood has been denied youthful offender status. She is charged with murder in the March stabbing death of 14-year-old Brooklyn Hollins.

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On this day last year, Missouri teen Alyssa Bustamante pleaded guilty to killing her neighbor, Elizabeth Olten. After the murder, Bustamante wrote in her diary, “I just f*cking killed someone. I strangled them and slit their throats and stabbed them. Now they’re dead. I don’t know how to feel ATM. It was ahmazing…”

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A 16-year-old North Carolina boy will spend 25 to 32 years in prison for killing his father and his father’s young wife. Matthew Liewald was 15 years old when he shot Christian Liewald, 43 and Cassie Buckaloo, 24, in their Pineville home.

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A young New Zealand man has been sentenced to life in prison with a minimum of 11 years for killing a love rival at a party last summer. Theodore Derrick-Hardie was 17 when he stabbed to death 18-year-old Warren Rosillo at a birthday party in the Auckland suburb of Pakuranga on July 29, 2011.

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A 13-year-old Pennsylvania boy allegedly told police that he killed his paternal grandparents Sunday because they talked badly about his mother and called her a whore. Zachary Proper of Venango County was charged Tuesday morning with the shooting deaths of his grandmother and grandfather at their home. According to police, Proper shot Dorothy Fross, 67, in the head, killing her, then unloaded the rest of the bullets into George Fross, 69, who was terminally ill.

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Laurie Tackett was born into a fundamentalist Christian home on October 5, 1974. As a teenager, Laurie became rebellious and at odds with her family. Then, along with three other teenage girls, Laurie abducted, tortured and burned to death 12-year-old Shanda Sharer. All four were tried as adults, two of them have been released.

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A 16-year-old boy accused of murdering his adoptive parents in a fit of rage will face a murder trial, a judge in Alameda County, Calif., has ruled. According to investigators, Moses Kamin’s motive may have been an unwillingness to deal with the consequences of being suspended from school for smoking marijuana.

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The Central Criminal Court in England ruled today that an unnamed 16-year-old girl is guilty of murdering Julie Sheriff, also 16, with the spiked end of a metal Afro comb. The assault took place in May of last year on a South London street. A witness reported that the teen first struck Sheriff in the collarbone, then plunged the comb into her temple.

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Police in Sealy, Tex., have arrested a 15-year-old boy in connection with the killing of a 30-year-old woman whose body was found in a motel Friday.

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