DECATURVILLE (AP) — A chancery court judge ruled Tuesday she does not have jurisdiction to preside over a dispute about an immunity agreement in the case of a Tennessee nursing student who disappeared three years ago.Decatur County Chancery Court Judge Carma D. McGee said only a criminal court can decide whether prosecutors can revoke an immunity agreement reached with Shayne Austin, 29. It was part of the investigation in the case of Holly Bobo, who was 20 when she disappeared from her family’s rural home near Parsons on April 13, 2011.Two West Tennessee men, Zachary Adams and Jason Autry, have been charged with murder and kidnapping. Investigators have released little evidence, though they have said Bobo’s body has not been found.A March 6 agreement granted Austin immunity from various charges, including “all charges arising out of the disposal, destruction, burial, and/ or concealment of Holly Bobo’s deceased body,” court documents show.The agreement was dependent on Bobo’s body being recovered from the place where Austin said it was buried.