Solnit would like us to believe Snow was complicit in Nieto's killing, because it supports her narrative.
Surely Solnit was made aware, before this article was published, of critically important details, like Nieto's diagnosed and medicated psychosis (he was off his meds), or his record of having violently confronted people in that same park. She chose to leave those details out of her story, entirely, because it would have muddied the point she hoped to make.
Meanwhile, Solnit is perfectly happy to write the story in such a way that a casual reader would have believe Snow was at fault. Some readers on this thread have apparently come away with the impression that it was him who called 911!
Psychosis: not important for us to know about. Later unrelated racist text message between friends: very important for us to know about. You don't feel manipulated?