They're farmers how are they supposed to know a fruit is riddled with bacteria
They're not running a billion dollar drug company who got caught giving bad drugs. If they couldn't tell the fruit was bad, and the people who bought the fruit couldn't tell it was bad, why do they deserve to go to jail.
The focus should be on using this unfortunate event to test produce more stringently to avoid this from happening again. Now of they were caught tampering with the fruit, or shipping it in a way that would cause bacteria to grow. that's a different story.