Call the irony police.

DNAinfo reports that practicing nonviolence is harder than advocating it.

A vigil for a man shot dead by Chicago Police this week during a car chase ended in a fight and arguments.

Paul O'Neal, 18, of the 1700 block of East 70th Street, was in a stolen car when he was fatally shot by officers on Thursday night, police have said. Police have said two officers broke rules in the shooting and had been stripped of their powers.

Activist Lamon Reccord said he knew O'Neal, calling him his "brother" in posts on Facebook, and organized a vigil for the man on Friday night. Attendees brought posters and lit candles at the vigil, but it ended after a fight and arguments.

"Violence is not the answer," someone said amid the fight.

Hat tip: Peter von Buol