Police in Berlin said Friday that they have opened an investigation of Roger Waters on suspicion of incitement over a costume the Pink Floyd co-founder wore when he performed in the German capital last week.

Images on social media showed Waters firing an imitation machine gun while dressed in a long black coat with a red armband. Police confirmed that an investigation was opened over suspicions that the context of the costume could constitute a glorification, justification or approval of Nazi rule and therefore a disturbance of the public peace.

[The Germans are a little sensitive about these matters, as you might imagine. And Waters is an idiot, at the very least, and clearly anti-Semitic. — Ed]