is paul henderson a pleasure to be here with all of you today. head of administration for the san francisco district attorney's office. basically my office gets involved the prosecution of cases. whenever we have an incident i'll call it that. more clear understanding of how my office gets involved. generally led into two categories. first is when there's an injury. when there's an injury involving a vehicle at my office it always involve involves whether or not it was an accident or if there was criminal behavior. typically this involved injury or felony behavior and difference being between felony miss de knee nors or misdemeanors could be sub jet to one year. the thing you need to keep in mind with injury analysis when your talking about a vehicle that always falls dangerous weapon. the second type of case we get involved in is property dam. most of the time that's civil issue when it's just insurance. my office gets involved with criminal conduct and braver and the best example i can give you is an in stance where by you have someone involved

last but not least we're joined by deputy or sorry, district attorney paul henderson that will help understand the enforcement related of prosecution of collisions. so, mary, please begin. >> good morning. as julian said i'm mary fo a lo on the security and enforcement division. in ours we have 271 parking patrol officers. 30 field supervisors and three assistant directors and what we do as it relates to pedestrian safety is we enforce parking regulations. those closely related are sidewalk parking, cross walks, bus zones, intersection blockage and to ensure the safety of pedestrians. our goal and our mission in enforcement is to ensure the safe and efficient movement of people and goods throughout the city. sidewalk parking, number one, sidewalk parking. from this quarter to the previous quarter, our sidewalk issuing has gone up 34 percent so we're well aware of the issues regarding safety and vehicles parked on the sidewalk. bus zones, that's a very big one. we want to keep the bus zones clear, so the pedestrians can safely load and unload at the curb, so that we don't have the issues where