container in a plastic bag. preliminary testing tests positive for cyanide. more testing is under way. on st. patrick s day in 1913 priceless works of art disappear ed disappeared in boston. we will look at how they the did it and how the works of art have eluded police for decades. we will look at who pulled off the greatest art heist in history. here is a quick preview. i d like to say it is boston s last best secret. reporter: who stole the 13 works of art from the isabella stuart gardner museum and where are they now? it is a question that continues to puzzle me museum security director anthony amore. there were lots of quirky things about it. every time you turn around there is a different interesting fact