Anybody familiar with the US presidential election campaign knows that the GOP candidate, Donald Trump, has been called pretty much every name in the book. But labeling him a copyright pirate wasn't one of them—that is until now.

According to a federal lawsuit (PDF) brought by a UK-based photographer named David Kittos, the Trump campaign ripped off one of the copyright protected photos the artist posted on Flickr, a picture of a bowl of the candy Skittles. The Trump campaign has used the picture in online advertising to highlight what the campaign calls the "Syrian refugee problem."

The lawsuit says the photographer is a refugee from the Republic of Cyprus and that the unauthorized use of his photograph in the advertisement is "reprehensibly offensive."

"The effect of this iterated unauthorized reproduction and redistribution is the rampant viral infringement of Plaintiff’s exclusive rights in his Photograph," the suit says.

The Trump campaign did not immediately respond for comment. The controversy went viral last month when Twitter removed the copyrighted picture from the Trump ad on Twitter in response to a complaint from Kittos.

The suit, which names Trump and others, seeks unspecified damages. But it calls the infringement "willful." That could net $150,000 per violation, according to the US Copyright Act.