A Ligonier man has died after a tractor dropped into a manure pit and pinned him. Ignacio Casillas of Ligonier died at the scene of the accident at Irish Acres, a large, commercial dairy farm near Butler, in DeKalb County. Lauer says a co-worker found Casillas and called emergency responders early Thursday Casillas was working alone at the time, so there were no witnesses and it's not clear exactly when the accident occurred.