The case of missing Central Florida boy Trenton Duckett will be featured on the national primetime show "Without A Trace" this Thursday on CBS.

There have been no confirmed sightings of Trenton since he left his great grandparents' house Aug. 26, 2006.

Monday night, dozens of people gathered to pray for Trenton's safe return at a candlelight vigil in Leesburg.

"We work on it and we think of everything we can to keep Trenton's picture out there and to keep it alive," Trenton's grandmother Carla Massero said at the event. "No, it is not always an easy job but you have to be determined, you have to be willing and you have to have faith."

Last week, detectives released photos of toys, birthday cards, photos and children's food they believe Duckett threw in the trash after reporting Trenton missing.

Detectives also ruled out theories that Trenton was taken by a stranger or that Duckett handed Trenton off to a friend or relative to keep him from his father, 22-year-old Joshua Duckett.

The Ducketts were separated when Trenton vanished.

Melinda Duckett fatally shot herself shortly after intense questioning by CNN talk-show host Nancy Grace.

Her family is suing Grace and the network, alleging the host's intense questioning caused severe emotional distress that led to the suicide on the day the taped interview aired.

CNN and Grace have asked a federal judge to dismiss the lawsuit.

Watch Local 6 News for more on this story.