How does Michael Connelly use imagery in The Black Echo?

Imagery:

"Bosch didn't remind Sakai that it was he who had been driving the ME wagon that dumped a body strapped to a wheeled stretcher onto the Ventura Freeway a few months back. During rush hour. The stretcher rolled down the Lankershim Boulevard exit and hit the back end of a car at a gas station. Because of the fiberglass partition in the cab, Sakai didn't know he had lost the body until he arrived at the morgue."

"She said nothing else and after a while he could hear her breathing turn deeper and longer. When a rare car drove by he would look over at her face as the light washed across it. She slept like a child, with her head leaning against her hands. Bosch cracked the window and lit a cigarette. He smoked and wondered if he could or would fall in love with her, and she with him. He was thrilled and disquieted by the thought, all at the same time."