abettor

In fact, the federal government itself may be an unwilling abettor to the fraud.

Of course, old Mole was represented as Harkaway's chief adviser, and his aider and abettor in the late pasha's death.

I have acted as a woman of my rank should act; and I am surprised to find in you an advocate and abettor of misconduct.

If the nurse was the prime mover in the plot Jean was an unrelenting abettor.