plea of not guilty on his behalf.

Maranger has repeatedly told Borutski and the court that his silence is being interpreted as acquiescence to the proceedings.

He sat motionless and expressionless in the prisoner's box Friday, sometimes watching the screen, other times staring at the ceiling or down at the floor.

An amicus curiae, also known as a friend of the court, has been appointed to ensure Borutski gets a fair trial.(CNN) An explosion at a chemical factory in the South Korean port city of Ulsan has killed four people, an official at the city's fire department has told CNN. Two people remain missing following the incident.

Fire department officials initially heard the blast at the Hanwha Chemical plant and were trying to determine its location when the emergency call came in.

Initial indications suggest the explosion, which occurred at around 9 a.m. local time Friday (8 p.m. Eastern, Thursday), was caused while workers were welding the interior of a waste water storage facility.

The blast tore out the upper structure of the storage facility, which subsequently collapsed.

Almost 30 emergency vehicles were dispatched to the scene, along with around 220 emergency workers, government officials police and military personnel.

Read More