Alcohol, probably. Maybe also/or heroin. And he'd just returned from South America, where he'd been chasing (unsuccessfully, I've read) some young guy. And wher

Alcohol, probably. Maybe also/or heroin. And he'd just returned from South America, where he'd been chasing (unsuccessfully, I've read) some young guy. And where he did, I gather, ayahuasca, maybe a few times. So he was probably crazier than usual. But anyway, it was indeed horrible that he shot his wife. But for whatever it's worth, it was a formative event in his career as a writer. As I recall, he credited it as the formative event in his career. And to your point, it was arguably one of the things that he had in mind when writing that.