Monk is starting to build a case, but Ludlow points out to Monk that all of the events described happened before he arrived in San Francisco on that Friday. At this, Monk asks Randy and confirms that he called Ludlow's cell phone, so he couldn't know where Ludlow actually was when he was contacted. Ludlow claims he was in Los Angeles, but Monk says he can prove Ludlow was actually in San Francisco. He presents a copy of a receipt from a pizza box he found in Ronald Webster's kitchen. It comes from Sorrento's, the pizzeria in Natalie's neighborhood.