Shultz confessed during the interview with The Contra Costa Times that he stabbed the 9-year-old boy while he was sleeping. He had a fight with his mother, and went to his friend's house to spend the night.

Shultz said the boys played video games and then went to bed. He told The Contra Costa Times he couldn't sleep and began feeling paranoid. He first thought of killing his friend before changing his mind.

"I had all these thoughts going through my mind," he began. Shultz decided his friend was too big to kill, so he “singled out his little brother and went to his room while he was asleep."

Shultz continued, “there was no feeling. I was asking myself why am I standing over him? What am I about to do?"

Then Shultz said he “put my hand over his face, and I stabbed him."

Shultz was arrested when he went to a hospital to be treated for slash wounds to the wrist.

Shultz's family had sought mental health care for him. After a brief psychiatric examination, Shultz was released from a hospital stay on Saturday, the day of the killing.