In April 2016, a third stamp from the stolen McCoy block turned up for auction at the Spink USA auction house. The seller was a British citizen in his 20s who claimed to have inherited it from his grandfather and knew little about the stamp's provenance. Examination revealed that the stamp came from position 76 in the pane of 100. The American Philatelic Research Library said it will work to take possession of the stamp once an FBI investigation is complete and other legal matters settled. The only stamp that remains missing is position 66.