A third person, John Dylan Adams, has been charged in the murder of 20-year-old nursing student Holly Bobo.

Special prosecutor Jennifer Nichols has confirmed that Adams has been charged with first-degree murder in the perpetration of a felony; especially aggravated kidnapping; first-degree murder in the perpetration of a felony, to wit: aggravated rape; and premeditated first-degree murder, according to Knoxville, Tenn.'s WATE-TV.

Previously, Adams had been charged with rape and tampering with evidence. He was arrested on Sept. 17, and the affidavit that gave the details for the arrest said that “this agent heard Dylan Adams tell other agent with the Tennessee Bureau of Investigation that on April 13, 2011, Dylan Adams disposed of item(s) he knew possessed evidentiary value relating to Holly Bobo … This offense did occur in Decatur County.”

Adams was already being held on federal charges for a September 2013 indictment in which he knowingly “possessed, received, concealed, stored, bartered, sold and disposed of a stolen firearm."

Zachary Rye Adams (John Dylan Adams' older brother) and Jason Wayne Autry were indicted in Bobo's murder in 2014, nearly three years after Bobo disappeared from her family's home in Darden, Tenn. Brothers Jeffrey and Mark Pearcy have also been charged with tampering with evidence and accessory after the fact. A woman named Sandra King told authorities that Jeffrey Pearcy had showed her a cell phone video of Bobo tied up and crying.

Shayne Austin, a key witness in the case, committed suicide in February. He had not been indicted and originally had been offered immunity in May of 2014, after agreeing to testify against Autry and Adams. But the offer was later revoked, as the district attorney held Austin was not cooperative or truthful in his testimony.

Bobo went missing in April of 2011, and her remains were discovered more than three years later, on Sept. 7, 2014, in a wooded area of Decatur County, Tenn. Two men were looking for ginseng and stumbled upon her remains, which test results confirmed were Bobo.

The late Bobo was cousin to country singer Whitney Duncan, who has been vocal about seeking justice after her cousin's death and actually attended elementary school with the just-charged Adams.

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