i guess this could be fourfor ms. wu. what is the procedure for the san francisco police department and the d.a. and is a public? >> it is public. there are external and internal policies for bringing forward materials that would affect the credibility of witnesses i hate -- credibility of witnesses. from the crime lab scandal -- >> situation. situation. i will use the word situation. in particular, and it is all known to the public -- this man had a conviction out of san mateo we had not learned about. we could not cross-examine on that. and that was a problem. it was a problem immediately addressed. so, i talked to a lot of other g-8's offices to find out how -- d.a.'s offices throughout the state to find out how they dealt with this. i find that a lot of offices across the state rely on that type of relationship. given the situation occurred with the crime lab, we needed to absolutely do more, and what we did is create a policy where they did, and i think it may have been cheap gas than -- chief gaston at the time were