I have one. A crazed teenager poses as a chef for you and your family. He lets the real chef make the food and then he knocks him out, pours enough poison in the food to kill 3 people, then plants the bottle of poison in the chef's hand. The crazed teenager then gives you and your family food, all of you unaware. You all eat and enjoy, then die. The chef is thrown in jail and the crazed teen walks out without ever being caught.
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