Gambetta and Primo Levi

I visited Diego Gambetta's page looking for his papers on the low quality of Italian academia .
With much surprise I discovered that he investigated the death of the author of If This Is a Man, one of my ten favorite books. He argues - very convincingly- that the death of Primo Levi was an accident and not a suicide . Although the two possibilities are tragic, the former seems in tune with his work and life.