Tennessee prepares to execute Oscar Smith, 3 years after last-minute reprieve

Just over three years ago, Oscar Smith came within minutes of being executed before Tennessee Gov. Bill Lee issued a surprise reprieve that revealed problems with the lethal injection drugs. On Thursday, the state is prepared to try again.

​ Just over three years ago, Oscar Smith came within minutes of being executed before Tennessee Gov. Bill Lee issued a surprise reprieve that revealed problems with the lethal injection drugs. On Thursday, the state is prepared to try again. Read More Breaking News, Latest News and Videos | CNN