How does Wally Lamb use imagery in Couldn't Keep It to Myself: Testimonies from Our Imprisoned Sisters?

Example of Imagery:

"Then, without warning, tears spill from my eyes, too. But don't misunderstand, Dad. I'm weeping not from sadness but from relief. You bastard, Dad. I wish I'd brought a hat pin to jab you with—to make sure you're really, truly dead."