CASTLE ROCK, Colo. (CBS4) – A court hearing happened Friday morning for one of two 16-year-old girls accused of plotting an attack on Mountain Vista High School in Highlands Ranch.

A judge will decide whether Sienna Johnson’s case will move from adult back to juvenile court. Johnson sat through several motions Friday morning that will set in stone how things will look for two very important upcoming hearings.

Sienna Johnson (credit Instagram)

Sienna Johnson (credit Instagram)

Johnson is currently being charged as an adult. Her attorneys are fighting to get her back to juvenile court. That was apparent judging by the amount of arguing they did on her behalf.

Johnson parents were present at the hearing.

The morning began with the defense attempting to close the court room. That motion was denied. They then brought forward a motion to remove the district attorney from the prosecution, which was also denied.

Johnson and Brooke Higgins were arrested in early December after someone texted a tip line warning authorities of their alleged plan to attack Mountain Vista High School by killing students and teachers.

Brooke Higgins (credit: Mountain Vista High School yearbook photo)

Brooke Higgins (credit: Mountain Vista High School yearbook photo)

The judge acknowledged the important decision he has to make.

CBS4’s Jamie Leary briefly stopped Johnson’s parents and asked them how the teen was doing. Her mother told Leary she appeared to be holding up.

The judge closed the reverse transfer hearing because of the medical records that will be presented. The preliminary hearing will be open. The hearings will happen one right after the other in the spring.


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