Walter Barton’s execution is scheduled for 19 May 2020. He is on death row in Missouri, USA since 2006 in connection with the 1991 murder of a woman, for which he maintains his innocence. He faced five trials over 15 years before being convicted and sentenced to death. Expert opinion and evidence, never heard by a trial jury, counter key elements of the prosecution’s theory which led to Barton’s conviction. The 19 May execution would be the first in the USA since COVID-19 was declared a pandemic. Governor Parson can grant Barton’s request for clemency, halting the execution.