A judge in Portland, Ore., is proposing that the uniforms of federal agents responding to long-running protests and unrest in that city be emblazoned with easily visible numbers so officers can be easily identified if they commit abuses.

U.S. District Court Judge Michael Simon aired the suggestion Friday in connection with a lawsuit he’s overseeing that accuses city police and federal law enforcement officers of unjustified use of force against journalists and legal observers monitoring the protests, which have centered in recent weeks on the main federal courthouse in Portland.

“I do think it might be appropriate to require any federal law enforcement officer who steps out of the federal courthouse building to wear a unique identifying code,” Simon said during a 90-minute teleconference with lawyers involved in the case. “I’m taking this very, very seriously.”

The judge said he was considering ordering that federal agents — including scores of officers the Trump administration dispatched to the city from across the country — wear numbers about 8 inches high that would make it easier to assess whether some officers are violating a temporary restraining order the court issued last week.