The 33-year-old behind the Wuppertal patrols, former fireman Sven Lau, published a video on his website on Saturday. Lau said that a "Sharia police" never existed, and that a group of men had simply worn the mock uniforms for a few hours.
"We knew that this would raise attention," Lau said, claiming that his goal was to spark a debate about Sharia law in Germany.
Lau is a leading member of Germany's Salafist movement, advocates of a strict Sunni interpretation of political Islam. He works with a mosque in his native Mönchengladbach, not far west of Wuppertal, and used to head the fundamentalist group "Invitation to Paradise." (Einladung zum Paradies, in German.)