anne andrea nakano has details. >> reporter: this was the scene on international boulevard as oaklanders came together to keep a suspected drunk driver from running away. just moments before the video was taken, he allegedly struck and killed a 17-year-old girl and critically injured her mother. tae factor captured this video. >> it was shocking. and just horrifying to hear to look at the ground to cetamide nighing it. sat the same time, there are cases that didn't make sense at all. >> reporter: floyd mitchell was at a town hall friday, but also spoke to the media earlier in the day. addressing what he called senseless murders in the last week. he says in one case two people were shot and killed over an argument about a parking spot. >> what i'm asking is how internally we result to gun violence. we have to stop this. there's no reason why we have four people shot in less than a week. there's no reason why this young woman and her mother was critically injured within a week. we have to do better as a city of oakland. we have to do better. >> reporter: some at this town hall were angry a