>> apparently, there was a half hour between -- 20 minutes between when they tied us up and when they actually headed into the gallery. and i've seen a lot of people questioning well, what were they doing? they were probably waiting to see if i did press the panic button. they were probably waiting to see if the cops were going to show up. >> according to the f.b.i., nearly nine of every ten museum heists have an inside component. rick abbot, the guard who left the thieves in was interrogated for days. he also took lie detector tests. he was never charged with anything. and when we talked with him, he maintained he had nothing to do with the heist. and what about the regular night watchman who called in sick that night? rick remembers after he buzzed the thieves into the museum, they asked him if he was alone. >> i wonder if that -- are you