They were "identified" by the prosecution, who has repeatedly tried to manipulate and fabricate evidence and violate the US Constitution. It's a BS story they created to try and slander Rittenhouse. The "OK" sign was added by the Southern Poverty Law Center, who is well known for missidentifying racism and "white supremacy" where there clearly is none. They are simply full of shit. The OK sign was intended to make the mainstream media look like idiots, hence why people like Rittenhouse use it to troll them. Millions of people use the OK sign for perfectly normal reasons, but the MSM only cares about white supremacists because they can use it to vilify political opponents.