A Wilcox County indictment says Bo Dukes lied to a GBI investigator who questioned him last year about the 2005 disappearance of Tara Grinstead.
A grand jury last week filed four new charges against Dukes: two counts of making false statements, one count of hindering apprehension of a criminal and one count of concealing the death of another.
The indictments put the Grinstead case into a third county, identify a third person who may have known about the killing and show that the GBI questioned Bo Dukes on the case more than a year ago.
According to the indictment, all four stem from a June 16, 2016 interview between Dukes and GBI investigator Jason Shouldel.
When questioned by the GBI last year, the indictment says, Bo Dukes denied knowing anything about Grinstead's death. He also did not tell the investigator that Ryan Alexander Duke had confessed the killing to him, and he denied discussing the matter with a man named John McCullough, the indictment says.
The indictment does not further identify McCullough.
Dukes already faces similar charges in Ben Hill County in the Grinstead case. In June, a Ben Hill grand jury charged him with concealing a death, tampering with evidence and hindering apprehension of a criminal.
Earlier this year, the GBI charged Ryan Alexander Duke, a high school classmate of Bo Dukes, with killing Grinstead in Irwin County in October 2005. Grinstead is a former Irwin County High School teacher who went missing that month.
Bo Dukes is charged with helping Ryan Duke burn Grinstead's body and bury it in a Ben Hill County pecan grove.
No trial date has been set for either man.