san der son and he is going to use some of our time to discuss what he found. >> thank you, i'm john san der son, operation's director with the billy transportation which is the broker in san francisco. and we administer the programs including the taxi debit card program. and sorry, basically the evidence that we found consists of a number of patterns that we sao in the transactional record that consists of the transactions that were performed in the taxi cab and mr. murray mentioned a bunch of the data points that are captured in that record. and we noticed a few things and we noticed that there were a number of riders and turned out to be 7 riders when we had done all of the math, who almost exclusively used him and at least three cases there were the riders only ever traveled with him during the period we looked at and they never rode with another cab driver at all. at the same time for the same period, those riders in their travel, never appeared to go home. they only traveled between other places but they never went back to their home address and to us that was very unusual and t