between the states. rob sand, the man who cracked the case joins me now. good to see you tonight. this is quite a story. for people who are not computer hackers, explain in layman's terms, how did he do this? >> essentially he had the job of writing code to pick the winning numbers. and what he did was he added just a couple of lines of code that would enable him on certain days of the year to actually use a formula to know what the numbers would be rather than having to pick from one in millions, he would be able to narrow it down substantially. >> martha: it is incredible, so you thought this case was tossed onto your desk as a young prosecutor, you look at the video and you start piecing things together, how did you begin to crack the case? >> we had a great team to work with. a special agents in the iowa division of criminal investigation at anderson and don smith were helpful.