Matthew Lee Johnson was convicted of killing Nancy Harris in Garland, Texas in May 2012. Harris died five days after Johnson lit her on fire during a robbery.

A Texas man was executed Tuesday evening for the burning death of an elderly clerk he set on fire during a convenience store robbery more than a decade ago.

WARNING: DISTRESSING CONTENT - Matthew Lee Johnson, who set shop assistant Nancy Harris on fire during a robbery in Dallas, Texas, addressed the victim's relatives before he was executed in prison