Prairie Street Mennonite Church in Elkhart, Ind., hosted a candlelight vigil with a somber but optimistic tone following its Christmas Eve service after a teenager was fatally shot in a church parking lot the day before.

Devonte J. Patrick, 18, was found with a gunshot wound after Elkhart police received a report of a shooting around 2:45 p.m. Dec. 23. The Elkhart Truth reported he was taken to Elkhart General Hospital…