Jeremy Thornburg, Shields' former boyfriend, and Lajuana Long are charged in her death.
Phillip Gregory says at this point in the investigation, there's no proof that Shields was murder, and if she was murdered, her body hasn't been recovered and no motives have been brought forth.
Candice Shields was reported missing from her grandparents house in Graham on Dec. 10, 2011.
Jeremy Thornburg and Lajuana Long were indicted for the murder of Graham resident Candice Shields.
The Young County Grand Jury indicted Lajuana Long and Jeremy Thornburg.
The all-volunteer team followed leads they've received about the 20-year-old's disappearance.
Candice Shields was first reported missing in Dec. 2011.
Today marks the one year anniversary of the day a 20-year-old Graham woman disappeared.
It's been almost a month since a 20-year-old Graham woman went missing, and now family members are helping in the search.