ROSEBURG, Ore. – The teenager accused of murdering his foster family in the Roseburg area has pleaded not guilty to eight counts of aggravated murder.

Kevin Adams, 16, was arraigned on additional charges from a grand jury on Thursday. A trial has been scheduled for Feb. 5, 2019.

At the arraignment the judge also cleared up what was previously set to be the maximum penalty, the death sentence. She said that was unconstitutional for someone his age, and that the maximum penalty would actually be a true life sentence without the chance of parole.

MORE: Mother, daughter and foster child killed in Roseburg; teen arrested

Police said he shot and killed his foster mother Donya Adams, her daughter Amory Adams and his younger sister Payshience Adams in their home near Lookingglass in November 2017.

According to court documents, his foster father, Robert Adams, was out of the home at the time of the muders, and when he arrived home, Kevin admitted to killing them.

A grand jury filed additional murder counts due to the circumstances of the alleged crimes.

Adams is being charged as an adult. He is expected back in court in April for a status check hearing.

RELATED: Teen murder suspect's attorney wants mental health records sealed