Ryan Brunn was found unresponsive at 4:15 p.m. in his cell at the state prison in Jackson, said Kristen Stancil, a department spokeswoman. Brunn was taken to a local hospital, where he was pronounced dead at 5:37 p.m., Stancil said in an email to The Associated Press.
Brunn pleaded guilty on Tuesday to Rivera’s killing. Her body was found in a trash compactor at the Canton apartment complex where she lived. At the hearing, Brunn explained his actions in chilling detail before apologizing to Rivera’s family. A judge then sentenced him to life in prison without parole.
Earlier Thursday, Canton officials said the city’s police chief had resigned after a scathing report found he took a “laid back” approach to the search for Rivera.
Chief Jeff Lance stepped down after the 17-page review revealed his department of about 50 officers violated several of its own policies and made many mistakes in the search for Rivera, said city manager Scott Wood.
Rivera was reported missing at her apartment complex about 7:30 p.m. on Dec. 2. Days later, Brunn was charged with her killing.
A call to Lance for comment was not immediately returned.