I also wrote an anti-BSL paper in high school. I focussed in particular about how miserably the Denver pit bull ban failed. Unfortunately I don't think I have my sources or even my paper anymore but I'm sure you can look it up. Basically there are more (illegally owned) pit bulls in and around Denver than there were before the ban.

On a side note, I am sooo glad the town I am living in now doesn't appear to have any laws that single out any breed. I'm not sure because I didn't look it up since I don't have a dog here yet. I work in a grooming salon and breed has never been a factor in whether we will turn away or take in a dog.