I don't think he is still wearing it, Michael.
What you see as his Jacket is, in my opinion, his Shirt, and as John indicated, he is wearing his Jacket wrapped around his waist.
Hi Duncan, I know it looks like a jacket but it is actually, the lady wearing glasses, Yola Hopson's? big black purse and Roy's right arm's shadow cast on Roy' back. Thank you for your input and everything that you do for us! With Much Gratitude and Admiration, Michael
You can see Roy is wearing his shirt under his jacket in this Cooper/Cook frame.