Prosecutors will seek the death penalty for three men charged with murder in the disappearance of a Tennessee nursing student four years ago if they are convicted.

Special prosecutor Jennifer Nichols acknowledged in court Wednesday that the notice had been filed.

Indictments from May charge Jason Autry, Zachary Adams and his brother John Dylan Adams with premeditated murder and murder in the perpetration of aggravated kidnapping and aggravated rape of Holly Bobo.

That replaced previous murder and kidnapping charges for Autry and Zachary Adams, and rape charges for John Dylan Adams.

Bobo was 20 when she was reported missing from her rural Parsons home in April 2011. Her disappearance and the subsequent lengthy search attracted national attention. Authorities say her skull was found in the woods in Decatur County in September.