Unless Missouri Governor Mike Parson grants clemency, Amber McLaughlin, 49, will become the first openly transgender woman executed in the U.S. She is scheduled to die by injection Tuesday for killing a former girlfriend in 2003.Attorneys submitted an application for executive clemency to the governor on Dec. 12, asking Parson to commute McLaughlin's sentence to life and noting that she was not given the death penalty in a trial by jury."Definitely afraid of being assaulted or victimized, which is more common for trans folks in Department of Corrections."The only woman ever executed in Missouri was Bonnie B. Heady, put to death on Dec. 18, 1953, for kidnapping and killing a 6-year-old boy.Kevin Johnson, 37, was put to death Nov. 29 for the ambush killing of a Kirkwood, Missouri, police officer."