The conversation between human and AI assistant.
[|Human|] Given this plot summary from The Night Buffalo, what caused Manuel to discover these occurrences caused by his late friend?
[|AI|] Gregorio committed suicide, this caused Manuel to go down a path of discoveries uncovering what led him to suicide.
[|Human|] 
Given this plot summary from The Night Buffalo, what caused Manuel to discover these occurrences caused by his late friend?