Videotapes
While watching the security camera video tapes from earlier that day, they finally came across the part where the two teenage girls arrived. They saw everything, from how they were laughing and mocking the sculpture, to how they jumped over the fence and defaced it. The entire thing really made the staff sad.
They couldn’t believe that someone would be so bored as to do something like this. It was the prize piece of art from the contest that just ended recently and now it was completely ruined. They were going to have to figure out what they should do next, but it would cost money.