Tara Grinstead murder: Bo Dukes pleads not guilty

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Bo Dukes, the man accused of concealing Tara Grinstead's death, waived his formal arraignment on Monday and pleaded not guilty to all charges, our FOX affiliate WGXA reports.

According to WGXA, the waiver states that Dukes demands a trial by jury in the murder of the former beauty queen turned teacher who disappeared from her home in Ocilla in 2005.

RELATED: Sheriff's Office: 2nd arrest made in murder of Tara Grinstead

For more than a decade, the mystery remained one of the state’s most notorious missing person cases.

Dukes was indicted on charges of tampering with evidence and hindering the investigation by burning Grinstead’s body.

WATCH: Search continues for Tara Grinstead's remains

Grinstead was last seen the night of October 22, 2005 when she attended a beauty pageant and barbecue in Fitzgerald, Georgia. Investigators said she went home to Ocilla and was never seen again. She was 30-years-old at the time of her disappearance.

Ryan Alexander Duke, a former student at the high school at which Grinstead taught, was arrested for her murder.

SEE ALSO: Grand Jury indicts Ryan Duke for murder of Tara Grinstead