Final answer:
Cheever arrests Elizabeth Proctor after finding a doll with a needle in it, using it as evidence of witchcraft based on Abigail Williams' accusations in 'The Crucible'.
Step-by-step explanation:
When Cheever finds Elizabeth Proctor in possession of a doll with a needle in it, he treats the situation very seriously. This incident occurs in Arthur Miller's play The Crucible. The doll is used as evidence to suggest Elizabeth's involvement in witchcraft, as Abigail Williams, one of the accusers, claims that she was harmed by a needle similar to the one found in the doll. Cheever is obligated by the court to arrest Elizabeth based on this supposed evidence of supernatural harm, showing how hysteria and unfounded accusations can lead to grave consequences during the Salem witch trials.