Abigail Williams gets help from Mary Warren in setting up the accusation and evidence against Elizabeth Proctor in The Crucible.
Mary Warren has been attending the court sessions daily and one day she is given a doll, a poppet, to bring home with her. Abigail Williams is the one who gives this doll to Mary Warren, who takes the doll to the Proctor house.
When the deputy comes to arrest Elizabeth he asks if Elizabeth keeps dolls in the house. He discovers the doll and examines it, finding a needle stuck into the belly of the doll. The deputy then tells the story of what "happened" to Abigail Williams as she was eating dinner. Abigail clutched her stomach and began to writhe in pain saying that someone was stabbing her. This led to the deputy's visit, prompted the search for the doll, and was used as evidence against Elizabeth.