turn traitor

Hubble, however, looked at him as if he had just turned traitor to the cause.

It would cause a lot of men to turn traitor.

Yet what if his own brain were beginning to turn traitor?

Moreover, I cannot think why he would want to turn traitor.

Perhaps, by her action, to convince him that she had not turned traitor to the King.

"Even though it means turning traitor to your own race?"

His career path would have taken him near the top had he not turned traitor.

She could think of no reason, for he wasn't the kind to turn traitor.

To turn traitor, join myself to their cause as the price of my life.

Andy looked at him as if he'd just turned traitor.