richard moran the whole sordid tale. she had never met diana before and had been told by a relative to pick diana up at the airport and, as they were driving -- >> diana nadell said to her, i'm not really here to go to a wedding. i'm really here to kill my mother-in-law. >> reporter: she says this to a person she's never met before? >> yes. >> reporter: and andrea benson says, okay, i'm in? >> for $10,000. >> reporter: and right there the deal's done in that car? >> and the plan starts taking shape. >> reporter: benson said she drove the four hours up to peggy's house, and then diana used that tracfone and called her mother-in-law. >> diana tells her, i'm here. don't you miss me? i want to come see you. >> reporter: at 1:30 in the morning and peggy lets her in. benson said she went in with diana. they were wearing hair nets and gloves to keep from leaving evidence. diana and peggy sat across from one another and talked. benson said at one point, peggy went upstairs, perhaps to call for help. she and diana followed her. t