His lawyer advised him of the prudence of not speaking to the press, but his client loved attention so much that he just could not resist a TV interview.
Clearly, it was not prudence that led her to switch to a lower-paying job where he worked, but obsession, and that was the point when he started to become afraid of her.
Most people have the prudence to find another job before quitting the one they have.
Prudence led him to accept a guilty plea and a life sentence, for if he had pled not guilty, he would surely have been executed.