How was the murderer caught?

The
reader spends the grand majority of 's waiting for justice to finally
catch up to Mr. Harvey, the middle-aged sexual predator who brutally rapes and kills Susie
Salmon, the narrator. Unfortunately, that particular reckoning never occurs. Near the end of the
book, it appears that Mr. Harvey has not only gotten away with his crimes but also is about to
add another victim to his list. However, while the authorities never catch up to him, the world
finds a way to deliver justice.

The last the reader sees of Mr. Harvey is as
he is stalking yet another girl near the end of the book. He emerges from a Greyhound bus and
goes into a diner. Shortly after, a teenage girl who had been on the bus comes in. Susie, the
narrator, states,

It was a teenage girl who had sat a few
rows ahead of him for the last few...