How does Patricia Cornwell use imagery in Trace?

Imagery:

"She gives him a stare that could nail a sign to a tree and his father had a label for her infamous stare. The hairy eyeball, that was what he called it. Edgar Allan Pogue has never figured out why a stare as scary as his mother's is called a hairy eyeball. Eyeballs do not have hair. He has never seen or heard of one that does and he would know. There isn't much he doesn't know."

"'Yes, ma'am,' Dave replied and he was working the overhead chains and pulleys, hoisting the naked pink body out of a floor vat of pink formalin, a big sturdy iron hook in each of her ears because that was they way they lifted people out of the vats when Edgar Allan Pogue worked there."