YORK, Neb. (AP) — A Nebraska judge has set a resentencing date for an inmate who killed his 12-year-old sister when he was 14.

The judge on Monday set Sydney Thieszen’s resentencing date on March 12. Thieszen was convicted in 1988 of killing his sister, Sacha Thieszen, at their home near Henderson. Prosecutors said Thieszen killed his sister because he was afraid she would tell police he was running away from home.

The judge in March ruled that Thieszen was entitled to the resentencing in accordance with a 2012 U.S. Supreme Court ruling that mandatory life-without-parole sentences for juvenile killers are unconstitutional.

Thieszen’s attorney says he will call two medical professionals to testify about his client’s mental health. The attorney says he might also call on Thieszen to testify.