children and high roll over risk but we don't have how to turn a car off if it's accelerating out of control for example. >> you're going to see that. that is coming. >> reporter: it did not come in time for california highway patrol officer mark saylor and his family involved in a fatal crash. the officer may not have known about the three second shutoff rule in the lexus sedan he was driving. toyota denies it was a factor in the acceleration accident. it happened a week after wally's incident which he describes as frighteningly similar. did that accident val date what you yourself experienced? >> it definitely valid ate d and reinforced my -- i had to find a solution. it was clear that there could have been a really horrible