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

This photo provided by the Jefferson County Sheriff's Office shows Austin Reed Sigg on Nov. 27, 2012. Sigg, 17, will be charged as an adult in the kidnapping and killing a 10-year-old Westminster girl is now being held in the Jefferson County jail. Prosecutors say he confessed to kidnapping and killing Jessica Ridgeway on her way to school as well as attacking a jogger earlier.
AP Photo/Jefferson County Sheriff's Office
Austin Sigg
AP Photo/Jefferson County Sheriff's Office

(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