NEW : A team from the ATF will help investigate the fire . Tuesday night 's blaze was the third fatal prison fire in recent years in the country . The government is working on transporting the bodies of the prisoners . The theory that a mattress had started the fire is gaining ground . An official said only 40 % of the inmates in the prison were actually convicted .
NEW : A team from the ATF will help investigate the fire . The government is working on transporting the bodies of the prisoners . The theory that a mattress had started the fire is gaining ground . An official said only 40 % of the inmates in the prison were actually convicted .