I kept walking and reached a bodega near the Rockaway Avenue subway station. Suddenly, a young black man started yelling at me to get out of Brownsville, presumably concluding from my skin color and my suit that I did not belong there. Three police officers heard the commotion and came running down the stairs. They reached me and stopped.

“What’s going on?” one asked.

“Nothing,” I told them.

“What does that say?” the officer interrupted me, incredulously, as the other two gathered around. I held the stencil up for them to read.

“What are you, some kind of asshole?” he asked.

I stood quietly, wondering whether they would arrest me or write a summons. The officers grumbled a few choice curse words and then ran down the stairs in pursuit of the young man. Though I was the one clearly breaking a law, they went after him.

I continued west, through Crown Heights, Prospect Heights, and then north through Fort Greene, carrying the stencil, talking to residents. I crossed the Brooklyn Bridge and arrived at City Hall. I walked around the building a few times, and then went down Broadway to the Wall Street Bull. From Brownsville to downtown Manhattan, I would estimate that I passed more than 200 police officers, some from a distance, some close enough to touch. Though I was conspicuously casing high-profile public targets while holding graffiti instruments, not one of them stopped, frisked, searched, detained, summonsed, or arrested me. I would have to go further.

I walked up to the east entrance of City Hall and tagged the words “N.Y.P.D. Get Your Hands Off Me” on a gatepost in red paint. The surveillance video shows me doing this, 20 feet from the police officer manning the gate. I moved closer, within 10 feet of him, and tagged it again. I could see him inside watching video monitors that corresponded to the different cameras.

As I moved the can back and forth, a police officer in an Interceptor go-cart saw me, slammed on his brakes, and pulled up to the curb behind me. I looked over my shoulder, made eye contact with him, and resumed. As I waited for him to jump out, grab me, or Tase me, he sped away and hung a left, leaving me standing there alone. I’ve watched the video a dozen times and it’s still hard to believe.

I woke up the next morning and Fox News was reporting that unknown suspects had vandalized City Hall. I went back to the entrance and handed the guard my driver’s license and a letter explaining what I’d done. Several police officers were speaking in hushed tones near the gates, which had been washed clean. I was expecting them to recognize me from eyewitness descriptions and the still shots taken from the surveillance cameras and immediately take me into custody. Instead, the guard politely handed me back my license, explained that I didn’t have an appointment, and turned me away.