Updated

The top-ranked senior at a suburban Indianapolis high school is asking a federal judge to stop a graduation prayer that the class voted to approve.

The lawsuit by 18-year-old Eric Workman says the prayer and the vote at Greenwood High School unconstitutionally subject religious practice to majority rule.

The senior class voted on the graduation prayer at a school assembly in September. The lawsuit contends the vote and the prayer violate the First Amendment.

The American Civil Liberties Union of Indiana filed suit Thursday on behalf of Workman on in federal court in Indianapolis.

The suit says Workman is first in his class and expects to speak at graduation. A message was left with school officials seeking comment.