throughout his actions in the short gallery, he's going back and forth about a half a dozen times, again, passing things that any art expert would say, my god, these are two raphaels, small and portable. why wouldn't you take those? it's a great mystery to the theft. >> another great mystery is this painting by edouard 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 about 8 by 10 and it was in a gold gilded frame and it was here. >> even though motion detectors picked up the thieves' trail by the entrance on the first floor and all throughout the second floor, there are no records of anyone entering the blue room. rick abbot says in the time he worked at the museum, the motion detectors never failed. but he also says it wasn't impossible to avoid the detectors. in fact, he knew exactly how to do that. it was a game he used to play at