SALINA, Kan. (AP) — A Kansas man convicted of fatally shooting his 9-year-old stepbrother will not be sentenced until December.

Eighteen-year-old Ryan Velez was scheduled to be sentenced Monday for second-degree murder in the 2010 death of Kaden Harper at the family’s home near Assaria.

Sentencing was rescheduled for Dec. 1 after his attorney, Mitch Christians, said he needed more time to review records for Velez from Larned State Hospital.

The Salina Journal reports  prosecutors say Velez shot his stepbrother while they were arguing about doing chores. He has been housed at Larned for treatment since pleading guilty.