MARYSVILLE – A 15-year-old Marysville boy was arrested Tuesday night on suspicion of manslaughter in the second degree in the killing of a 16-year-old Marysville Getchell High School student.

He was booked into Denney Juvenile Justice Center in Everett after being arrested at 5:10 p.m.

However, on Wednesday, a judge agreed to release the boy from Denney and put him under house arrest. The judge did find probable cause for the arrest, but the teen has not been charged.

It is the newspaper’s policy not to name juveniles arrested and charged with crimes.

“The arrest does not signal the end of the investigation. Aspects of this case are continuing to be examined by Marysville investigators,” said Sgt. James Maples, investigations supervisor of the Marysville Police Department.

Robbie Myrick Jr., 16, died Aug. 28 at Providence Regional Medical Center in Everett. His death was the result of blunt trauma to the left side of his head resulting in a serious brain injury. He suffered the injury in a “fist fight” Aug. 19 at about 2:40 p.m. in the 8200 block of 52nd Dr. NE in a wooded area known as “Spook Woods,” just south of Pinewood Elementary School.

Investigators found out the mutually agreed upon fight was over a girl who had recently developed a relationship with Robbie.

Police say both Robbie and the suspect had “landed punches” on one another during the fight. However, at one point Robbie went to the ground. The suspect punched, and then kicked him in the head. Robbie never got back up, police said.

Witnesses said they tried to wake the victim, and when he did not respond after about an hour, 9-1-1 was called, and Marysville Fire Department was dispatched to the scene.