Who said "You don't know what you've done"?

This quote is attributed to Sheriff Bell.

You don't know what you've done - Sheriff Bell

"You don't know what you've done"

Sheriff Bell

Character in No Country for Old Men

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"How does an old man know he's gonna die?"

"You can't make it go away by not looking at it."

"I got no idea what I'm doing most of the time."

"You think when you wake up in the mornin yesterday don't count, don't it?"