Green is not the primary author. Lacour is the primary author. Green is the older, more established, secondary author; he's supposed to be playing a sort of m

Green is not the primary author. Lacour is the primary author. Green is the older, more established, secondary author; he's supposed to be playing a sort of mentor role to the primary author. He has sent a letter outlining his concerns about the paper, but he didn't do the work himself in the first place. Lacour has not indicated he supports the retraction request and it is extremely reasonable for Science to contact him about it and hear what he has to say before proceeding.