You were at your neighborhood barbeque when noticed a lady reporting a theft to the police. This is what you heard:
Lady: Help! A man grabbed my purse and ran away!
Police: Did you notice anything about him that can help us identify him?
Lady: Yes, he had a plate of peas.
Police: Only peas?
Police: I see. Don't worry, we got this.
What happened? How did only the conversation above get the police confident in finding the thief?