"lamb to the slaughter"

If I was the detective leading the mr maloney investigation I would have questioned mrs. maloney about her husband first of all. then I would have questioned the grocery. I would have my officers search every inch of the house. If nothing poped up I would continue to talk to mrs. maloney. If she would of asked me to eat her food it probly would have sparked a gquestioned inside me and i would have became suspicious ,but i probly wouldn't have cought her though because she did that like a pro.