Do you agree with this Pulitzer-prize winning author’s version of how Vincent van Gogh died?

There’s a serious problem with this “new” version of events. Do you see it? Rene Secretan is rumored to be a kid that taunted Van Gogh and claims he[Secretan] stole a gun from the Ravoux Inn. There’s just a very obvious piece missing. Why didn’t anyone even ask Secretan if he killed Van Gogh if that was the theory, and if that’s why he was interviewed?