Just moments before about 30 officers turned their backs on the mayor, Lightfoot tried to talk to the male officer’s father, who himself is a retired Chicago police officer. He clearly wanted nothing to do with Lightfoot, according to two sources who were there.

The father excoriated the mayor and blamed her for what had happened. One source said Lightfoot handled herself well as the father yelled at her. She listened and treated him with respect.

It was then suggested that Lightfoot say a few words to nearby grieving officers, but as she approached, they all walked away from her and to the other side of a bank of chairs — and turned their backs, the sources said.

“They did the about-face — it looked like it had been choreographed,” said one of the sources present, calling it “astounding.”