A judge found a California 12-year-old boy guilty of second-degree murder and sentenced him to remain in juvenile detention until he is 23, according to reports on Jan. 14.

Joseph Hall killed his neo-Nazi father when he was 10, on May, 1, 2011, by putting a gun to his sleeping father's head and pulling the trigger. Riverside County Superior Court Judge Jean P. Leonard charged him as a juvenile but said evidence showed that Hall plotted the attack and knew the killing was wrong.

The late Jeffrey Hall was a West Coast leader for the neo-Natzi organization known as the National Socialist Movement. Court records indicated that he took his son Joseph to neo-Natzi meetings and activities, including events with hooded members of the Ku Klux Klan and one in particular where they joined others for an illegal immigrant "patrol" along the Mexican border.

The judge noted during the trial that Joseph led a life of abuse; his father exposed him to guns, hate and violence at a young age, which corrupted his thought process and played a partial role in the 12-year-old's murder of his father, according to the Los Angeles Times.

"It's clear that this minor knows more than the average child about guns, hate and violence,'' Leonard said, though she then added, "this is not a naive little boy unaware of the ways of the world.''

A juvenile disposition hearing is scheduled for Feb. 15.

The news report added that most juveniles convicted of second-degree murder are sent to one of three juvenile detention facilities run by the state Department of Corrections and Rehabilitation, none of which currently hold a juvenile under the age of 14. For that reason, the judge said she would consider alternative placements.

The boy's attorney, public defender Matthew Hardy, told reporters after the trial, "That's not a place for children. He'll be spending his time learning how to be a gangbanger or a killer." He said he plans to appeal Monday's court ruling.