Holly Bobo's murder case:Man granted immunity commits suicide

Shayne Austin, who Tennessee authorities tried to indict in connection with the kidnapping and killing of a nursing student has committed suicide, his attorney said today- Tuesday.

The investigation into the killing of Holly Bobo has not been smooth. The suicide of Shayne Austin is the latest twist.

Bobo, a 20-year-old nursing student, disappeared in April 2011. Her remains were not found until last September, in Decatur County, Tennessee.

Shayne Austin was never indicted, but was in prosecutors' sights and was threatened with possible charges.

Two other men -- Jason Wayne Autry and Zachary Adams -- are charged with especially aggravated kidnapping and first-degree murder in Bobo's killing. Both have pleaded not guilty.

Austin's role in the case, according to attorney Luke Evans, was to cooperate with authorities in exchange for immunity from prosecution.

Days after Austin was granted immunity in March 2014, the state tried to void the deal and tried at least twice to indict Austin, his attorney said.

As a result, Evans filed a civil breach of contract suit against the state, asking the court to enforce the immunity deal as well as a restraining order to prevent the state from further attempts at indictment. That case is pending in circuit court, Evans said.

The state said it revoked the immunity agreement because Austin was not being truthful or fully cooperative.

Evans told the affiliate that his client always maintained that he had nothing to do with Bobo's death.