them. their job was done. but remember video camera perched outside the door with where they entered? the thieves must have known it was there and must have known where it was hooked up to be with because before they left the museum, they made one last move. to be sure nobody ever recognized them. >> there was a point where they kicked open a door, pried open a door, broke it bretty badly and took the videotape we had. only evidence of what they looked like. from are the security director's office. >> reporter: at 2:41 a.m., the door to the museum opens and closes. and then -- opens and closes again four minutes later. it must have taken the thieves those two trips, in and out, to load up the art. then, just as suddenly as they arrived, the thieves were gone. >> once they leave, they're never heard from again. >> reporter: never heard from again. and never caught. rick abath's fear that the thieves were going to burn down