"If – this fella done somepin wrong, maybe he’d think, ‘O.K. Le’s get the hangin’ over. I done wrong an’ I got to take it.’ But this fella didn’ do nothin’ wrong. He don’ feel no worse’n if he killed a skunk."
– John Steinbeck
The Grapes of Wrath, Chapter 26. Tom Joad feels no guilt about killing the police officer who murdered Jim Casy. To him it is a righteous deed, as he compares it to killing a skunk.