Help Removing Back Window from a 65 Barracuda

thanks Al it's very pliable. This car was being restored but the young man gave up on it. There were three cars he was using to make one. This is the one he was restoring so It appears the glass was put in recently. One of the other cars did not have the glass. So even if it is not savable you have any advice on safely getting the glass out?
Thanks,
Jeff