An elderly couple, childhood sweethearts, had married and settled down in the old neighborhood, and were celebrating their fiftieth anniversary. They walked down the street to their old school. They held hands as they found the old desk where he had carved "I love you Sally."
On the way back home, a bag of money fell out of an armored truck, practically at their feet. She picked it up, but they didn't know what to do with it, so they took it home. When she counted the money, it was fifty thousand dollars.
The husband said, "We have to return this to the rightful owners."
She said, "Finders keepers!" put the money back in the bag, and hid it in the attic.
The next day two FBI agents were going door to door in the neighborhood looking for the lost bag, and showed up in their home. The men asked if either of them found the money that fell out of an armored car yesterday.
She replied, "No."
The husband said, "She's lying. She hid it up in the attic."
She whispered to them, "Don't believe him, he's getting senile."
But the agents sat the man down and began to question him. One said, "Tell us the whole story from the beginning."
The old man began, "Well, when Sally and I were walking home from school yesterday..."
The FBI guy looked at his partner and said, "Let's get out of here."