German police are currently trying to locate a man who was photographed at a public swimming pool with a massive tattoo of the Nazi death camp Auschwitz on his lower back, in breach of German law.

Another swimmer caught the tattoo on camera and complained to police, launching the search. The second swimmer, who remains anonymous, told the German Bild that he was horrified to see the silhouette of the death camp on the man’s lower back.

Under the image of the death camp, a site where over one million people – nearly all of them Jews – were murdered, the tattoo included the words in German “Jedem das Seine,” meaning “to each his own.” The phrase was written over the entrance to Buchenwald, another death camp where at least 50,000 were murdered.

The man’s tattoo was photographed at a public swimming pool in Oranienburg, a town located north of Berlin; Oranienburg itself housed another death camp.

The photographer complained to a lifeguard at the pool about the tattoo, given that displaying Nazi symbols or slogans is illegal in Germany.

“Instead of taking immediate action, he just told me there was nothing he could do,” the witness told Bild. “That shocked me even more. But what was worst was that nobody else was offended by the anti-Semitic tattoo.”

However, after the swimmer told a second lifeguard about the illegal tattoo, the tattooed man was asked to leave.

Prosecutors in Germany revealed they think they have identified the tattooed man, with senior prosecutor Lolita Loden Kamper telling the paper that “since Friday we have been investigating a particular known suspect on suspicion of incitement.”

The man was not named, but was identified as a convicted criminal, and a member of the far-right National Democratic Party (NPD). The party is generally considered to be neo-Nazi.

Members of the German far-right often have Nazi tattoos according to reports, but they are usually covered up in public due to German law banning the display of such symbols or slogans in public.