Police joke

A farmer wrote a letter to his son in jail for robbing a bank: “This year, I can’t plant potatoes because you are not here to plow the field." The son wrote back, “Papa, don’t dare plow the field. That is where I hid the money I stole.” The police intercepted the letter and by the next day they'd dug up the entire field but found nothing. The son wrote to his father, “Now you can plant your potatoes."