An old fellow writes a letter to his sone in prison.
Dear David,
I have bad news. I will be unable to grow my own Garden this year as I am to old and frail to dig it. I dont know how I will get on having to buy all my Vegetables and you know how much I like em home grown. Oh well, nothing to be done since you are locked up and all.
Love Dad.
A day later a short letter arives
Dad,
For christ sakes STAY OUTA THE GARDEN, you may disturb one of them bodies...
That night the house is raided by the FBI, they go through that garden with a finetooth comb and find nothing.
A few days later the old fellow gets another letter.
Dear Dad,
Sorry I wasnt there to dig your garden, but I thought my friends at the FBI would do just as good a job......