Jessica Ridgeway Update: Sex charge added against Austin Sigg, murder suspect in Colo. girl's death

(CBS/AP) GOLDEN, Colo. - A sexual exploitation charge was added against a Colorado teen accused of kidnapping and killing 10-year-old Jessica Ridgeway, prosecutors said.

Pictures: Body of 10-year-old Colo. girl found

Austin Sigg, 18, is scheduled for a preliminary hearing on Friday in Golden, Colo. He already faces murder, kidnapping, sexual assault and robbery charges for allegedly killing Jessica in October 2012 and attacking a runner that same year.

Attorneys for the state said they're dropping two charges against Sigg but adding the exploitation charge because of a video of a child found during their investigation.

The Colorado Supreme Court overturned a judge's decision to close Friday's proceedings in which prosecutors plan to lay out their case.

Prosecutors expect the hearing to move ahead, even though a hearing earlier this month was canceled as the media challenged the decision to close it.

Complete coverage of Jessica Ridgeway on Crimesider