delivery man and he delivered a pizza. the group he delivered it to captured him, he told police, put this bomb on his neck and told him to rob a bank. he asks police to call his boss. then to save his life. >> why is nobody trying to come get this off me? >> 25 minutes tick by. then the device begins to beep. >> i heard this thing ticking. it's going to go off. >> in an instant, the bank robber is dead. >> the death of brian wells in this parking lot that day turned out to be only the beginning of the most elaborate, intricate, and some say still-unsolved bank robbery case the fbi has ever had. >> at the end of it all, our system worked. our law enforcement partners solved the puzzle and we