A Texas man is set to be 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.
Matthew Lee Johnson was condemned for the 2012 death of 76-year-old Nancy Harris, a great-grandmother who was splashed with lighter fluid and set ablaze at a store in Garland.
Johnson, 49, was scheduled to receive a lethal injection after 6 p.m. at the state penitentiary in Huntsville…