In "The Scarlet Letter," why is Ann Hutchinson sent to prison?

Anne Hutchinson disagreed with the religious authorities in Salem in several ways, including whether a person needed a minister to direct his religious life. Contrary to the teaching of the church at that time, she held religious gatherings in her home and led discussions that countered the church's emphasis on "preparation," a concept that concerned how a sinner considered his sin and the state of his soul to earn divine grace. An intelligent and gentle woman, she was a midwife and therefore had contact with many women in the community. The authorities feared her influence would spread. Eventually she was expelled from Salem.