The chicken knew.
While it was scratching in the grass at the side of the street bordering the wooded area alongside the railroad tracks, the chicken knew what no one else did.
The passer-by who discovered the body near the tracks didn't know what happened to the man. Neither did the police, who could only discern that the deceased hadn't been hit by a train.
The man was dead, and he left no clues as to why.
But the chicken knew.
Linking up with Ivy at Uncharted for Six Sentence Stories with the prompt "left."