Can't you take a 'photo'?
"et billede" is a picture, a photo is "et fotografi"
Reported: "he takes a photo of the dancing couple" should be accepted.
From the context, it is very clear that we are talking about a photograph.
You can only take a picture using a camera, so here picture = photo.
Apparently he's a thief stealing art from their walls while they are distracted.