The Nevada heat had finally given way to a cool, dry desert night. It was 1:00 a.m.

I had spent more than twenty years wearing a badge for the Las Vegas Metropolitan Police Department, working as a senior detective in the Violent Crimes unit. I had seen the ugliest corners of human nature. I had stood over bodies in alleyways, walked through blood-soaked domestic homicide scenes, and sat across interrogation tables from men whose eyes held nothing alive behind them. I believed my years on the job had hardened me. I believed I had built up enough emotional armor to survive anything the world could show me.