An Oahu grand jury returned an indictment Thursday charging an 18-year-old Kaha­luu man with killing his uncle, a former professional rugby player and former New Zealand police officer, and threatening his brother.

Samuela Mataele was charged with second-degree murder, first-degree terroristic threatening and three offenses related to drugs, firearms and ammunition.

According to court documents, Mata­ele’s 36-year-old brother, Leland, said he was sleeping in their Kaha­luu home Sunday when he was awakened by a gunshot.

Leland Mataele said he saw his brother holding a rifle, and when he asked his brother what he was doing, his brother said, "I’m going to kill you."

While Samuela Mataele was reloading the rifle, Leland Mata­ele said he ran out of the house.

On the way out, he saw their uncle, Tongan-born Joshua Sio­siua Tui­ono Lia­va’a, with a gunshot wound in his head. Lia­va’a is a former Auckland police officer who lived with the Mata­ele family.

Police said Samuela Mata­­ele also stole a wallet belonging to a 17-year-old boy.

Samuela Mataele remains in custody at Oahu Community Correctional Center unable to post bail of $250,000.