AUBURN — An Androscoggin County grand jury hearing evidence of possible criminal wrongdoing in a fatal October hayride in Mechanic Falls is expected to rise Wednesday.

This is the third consecutive month the same grand jury has gathered to consider the case presented by the Androscoggin County District Attorney’s Office.

District Attorney Andrew Robinson said his office had reviewed hundreds of pages of investigative reports and hired an expert to review the case for possible criminal action before first presenting it to the grand jury in May. He declined to disclose the names of any people against whom the grand jury is considering returning indictments.

On the night of Oct. 11, a flatbed hay wagon on The Gauntlet at Harvest Hill Farms on Route 26 spilled dozens of riders into the woods when the Jeep pulling it down a steep hill jackknifed and slammed into a tree. By the following morning, it was revealed that a 17-year-old girl from Oakland had died and nearly two dozen others were badly hurt, suffering broken bones and head, back and neck injuries.