Potato farmer

A man lives on a farm, he writes to his son in prison - I can't grow potatoes this year. I'm too old to be digging up the field. Soon he gets a letter back from his son. - You can't dig in the field, that's where I buried the bodies! The next morning, people came from the police. They dug up the entire field but found nothing. Soon the farmer gets another letter from his son. - Now Dad, you can grow potatoes. It was the best I could do from here.
If you have the will, there's always a way