A leg of lamb

Mary Maloney knew what she did was not good but she did what she did. Then she went to the cellar and opened a draw and found a bottle of food poisoning. One drop of that could kill a whole group of people. There it goes in the lamb. One drop. "Not more than one drop". She did it. "Nee, nah, nee, nah." There was the police. They came in. There was no evidence but she told them to eat the lamb and they were poisoned in 5 minutes. What do you think she does next?                  She ran....