Should past trauma prevent a convicted killer from being executed? The Marshall Project’s Maurice Chammah reports on “mitigation specialists” who try to save the lives of death row inmates by investigating their histories. This episode was produced by Hady Mawajdeh, edited by Jolie Myers, fact-checked by Laura Bullard and Matt Collette, engineered by Patrick Boyd, and hosted by Noel King. Transcript at vox.com/todayexplained Support Today, Explained by making a financial contribution to Vox! bit.ly/givepodcasts Learn more about your ad choices. Visit podcastchoices.com/adchoices