This April 21, 2014, photo provided by the Missouri Department of Corrections shows Mark Christeson, who was convicted of killing a woman and her two children nearly 20 years ago.
This April 21, 2014, photo provided by the Missouri Department of Corrections shows Mark Christeson, who was convicted of killing a woman and her two children nearly 20 years ago. AP file photo
This April 21, 2014, photo provided by the Missouri Department of Corrections shows Mark Christeson, who was convicted of killing a woman and her two children nearly 20 years ago. AP file photo