throughout his actions here in the short gallery he goes back and forth about a half dozen times, again passing things that any art expert would say, my god, these are two rafaels. small and portable. why wouldn't you that he those. it is a great mystery to the theft. >> reporter: another great mystery is this painting by edward manet. the oil painting was taken from the blue room on the first floor. >> it hung right below manet's portrait of his mother. it was in a gold guild frame and it was here. >> reporter: though the motion detectors pick up the thieves on the first and second floor, there are no records of anyone enter rg the bling the blue root rick abath who says he passed through the room that night on his regular rounds before theft. rick abath says in the time he worked at the museum, the motion detectors never failed.